First of all, sorry to hear that university has been such a struggle for you. University accommodation is notoriously noisy.
Any kind of response from the university would most likely be from using their complaints process. I think it unlikely that you would receive and reimbursement of fees. You should receive some kind of response if you were to make an official complaint, but that would not definitely include an apology.
I am not sure how long ago you left the university. If you have stopped attending, yet are still officially registered, you could get some guidance around complaining from the student support department of the students' union (but it may have a different name, as each students' union varies). Another option would be to contact Citizens' Advice or an advocacy service to help you if you want to complain.
You would be wise to consider whether it is worth complaining. If you are still finding life difficult now you could find that complaining takes up what little energy you have and may not result in a response that you are satisfied with.
Stopping university this time sounds like a wide decision for the sake of your health. Apart from anything, the disability service sounds disorganised. I wonder if the staff member who left suddenly couldn't cope with the place because it was not running efficiently.
If you ever decide to study again, it could be that distance learning is better for you, or just that another university organises their teaching in a way that suits you better. Living at home, or finding your own place rather than sharing with students (especially first years) would give you more control over your home environment and meals. Some universities have funding to help mature students.
All the best.