Interested. How do you submit a private message, please?

My relationship with my supervisor wasn't easy throughout. She tended to disappear for months, for example, doesn't answer the emails at times, cancelled or dnd'd the appointments. I even had to ask her superiors to engage her twice. (always being very diplomatic). Yet, I felt that when she was engaged she provided good constructive feedback. She read my chapters several times. I trusted her academic judgement. But now she agreed with the examiners, meaning that even her academic judgement was wrong. And while I can excuse some aspects I cannot excuse everything. Some things are too basic and should have been seen years ago. So I was wondering whether there could be a change of supervisor at this stage. But I am afraid that the university will not agree with this as finally, I am responsible for my work. yet, I do want good guidance.

yes, I do have the supervisor's positive comments in writing. She told me more than once that my work was good. I would never have submitted if I didn't receive good feedback from the supervisor.
The examiners gave me a full list of reasons why it's not good. Basically, they didn't like anything.

I am shattered. I submitted my dissertation after my supervisor gave positive feedback on the dissertation. She said that the write up was very good.
I went for the viva but the examiners' feedback was negative. I was asked to resubmit.
Now that my supervisor has seen the examiner's feedback, she agrees with their feedback. Yet, she was very clear that her support will be very limited. There will be no meetings but she might read the work again. (but I am doubting this!) I am a burden for her since I am an extra number. My sense is that she washed her hands of it.

Did anyone experience this?
Where they supported or is it assumed that you work on your own on the feedback given by the examiner?
Could the university give you a new supervisor?

dear Adam is it possible to receive some advise on failed phD, please? Where can I contact you please?