Finding a PhD funding is pretty difficult for first or 2:1 graduates. With 2:2 the chances are much lower because they have already enough applicants with higher grades. You are trying to convince posters that 2:2 is fine. In fact what they tell you is the reality of the situation. The point is not if it is fair or not. It is not pleasant news but you could think of alternatives. If you have a Master (taught or research) with a good grade, this would increase your chances.

You are doing fine by sending CV to different supervisors. Moreover you can add that you would like to have a short face to face conversation if they are in the same or a close by city. Do not be disappointed because some will never reply or reply negatively. Just keep your motivation and your day will come for sure. All the best.

Hi. As I personally have MRes, I do not think it is the best choice. The MRes is a non standard degree especially outside the UK. Also it takes theoretically one year but could take longer.
Now let us look for what we can do. You could email potential supervisors with a cover letter. You do not have to mention your grades in the cover letter. Just write them in CV. You might a positive feedback from a supervisor. In the mean time, you could apply in several universities for either MRes or another taught Master but in a slightly different field.
By the way, how do you plan to find the Master? do you think you can afford one year without a salary?

Hi. I am very sorry to hear this. Life is not fair. I do not have a magic solution but I feel your pain and encourage you to apply more and try to take courses of the required skills and document them in your CV. Look for online courses and write them in the CV and apply with confidence with your heads high. I am sure your day will come. I wish it comes sooner than expected.

hi. I have assumed you do not need to have more data or experiments. How far are you in writing? Is the situation really that bad?
There is no "standard" definition for the quality of a PhD. Is it publications? novelty? You might be surprised when you read some PhD theses in terms of quality and original research.
If the situation might be not that bad that you think. If so, sacrifice some time and submit the best possible concrete thesis aiming for a PhD and then who knows? There is an examination panel who decides.

I agree with TQ. Why not? I do not have statistics but the chances of appeals to be accepted is not particularly high. Just do not put too much hope and while doing it, look forward search for a job and assess the situation in one year or so. At this time, you would have known if you want (need) to do a PhD or not.

Glad to hear that your start is happy. Congratulations and wish you to achieve your goals.

I am sorry that you had to go through this. Unfortunately I doubt the university would change the supervisor too. For them you are a burden who they would like to get rid off. Even your desk and computer they would try to take back as soon as possible. Try to get help from Postdocs or secondary supervisors but at the same time do your best to finish. I wish everything goes well soon.

If you want to apply for the new PhD then do it. But if I were you, I would prefer to concentrate on what I have. If things with my current position do not go well, then I would start looking for alternatives.

I do not have this experience but I think it should be OK. Probably 18 hours is too much. Most importantly, do not waste your valuable hours. If you spend 20 hours at PhD work, concentrate and spend 20 efficient hours not just hanging around like some PhD students. do.

I agree with the above comments. Only if you really ignored the corrections in a bad way. I think "genuine effort" would be appreciated in 99% of the cases.

Hi. Sorry to hear that. I understand what rewt said about PhD salaries in the UK. It is terrible but this is why many decide to do a PhD in continental Europe. 1450 Euro seems a bit reasonable. Moreover it was agreed already. Putting salary in assessment criteria is not something you should be ashamed of. You have already gone from 2200 to 1450. It is absolutely your right to be financially "OK" during the next 3-5 years. Otherwise it might affect your progress. Now you can ask your PI if there is a way to include additional compensation. Sometimes they hire students in a part time project and give them extra money.

Being self funded is a great advantage. Funding is the most important. You do not have to have a full proposal. Just contact potential supervisors directly.

I am not sure I understand it correctly. Supervisor A offer you a PhD position. Supervisor B offered the same position or a different one? Or Supervisor B is just talking?
You can choose what is good for you. There is no ethical committent to follow a particular one. Nevertheless choosing based solely on academic reputation/research output is not the best idea.

Hi Azhan, I am sorry to hear that. I agree with Walter_Opera. I have seen in some universities that they want you to have "what they believe" a necessary theoretical background. They should have told you earlier before accepting you. If like noted by pm133, they want you to explain the theory behind your work, then you have to be able to do it. But requiring a "general" background in math is not fair in my opinion. If you understand the math behind your work, you should be fine.