Hello Rashim
I'm sorry that you are having a tough time. I would suggest that you take positive action. Firstly, try to encourage your supervisor to get more invloved - take active steps to book appointments etc. Secondly, keep a diary and note anything involving discrimination, even if it is small and seems petty. If there is a problem, you need evidence. If you feel that you are being discriminated against, it's a serious issue - you can go and speak to the union rep in confidence. Thirdly, don't listen to small minded morons.
Good luckl!!
Best wishes