I'm not sure how useful my contribution is on this because I didn't go to university and neither of my children did. However, my son has been in the same company now for 17 years, is well paid and enjoys his work. My daughter had no interest in formal education but is knowledgeable and creative and although she is by no means well off, she has forged a path with which she is content. University isn't the be all and end all of everything. As you will have read in the previous posts, many people lead happy and satisfying lives without finishing - or even starting - university, and some people who get degrees find it does not necessarily guarantee happiness.
I suppose the issue for your daughter is that she started at university and now feels a failure that she was unable to continue. You are naturally concerned but I think it is important that you don't convey to her any sense of anxiety about what has happened. I think that as long as you don't see this as a disaster (which it isn't) and remain cheerful and positive, hopefully in time she will come to realise that there will be other opportunities for her out there somewhere.
I don't know what your daughter was studying at university but for the time being she might find it liberating to do something just for pure interest and enjoyment or to learn a skill, rather than to acquire a qualification. It's important to have interests and goals but they don't necessarily have to be tied up with formal qualifications - at least not at this point. I have read about people who have almost by accident found something that interests them and have gone on to develop skills that have led to career opportunities. Also, as someone else said, OU might be another option. I started work at 17 but in later years did a foundation course and several modules. I found the whole experience very enjoyable and the learning material and tutor support were excellent. There is more flexibility and less pressure when you can build up learning (and, if you want, qualifications) over a longer period of time.
I do hope that she gradually starts to relax and feel more positive about the future. It will take a little time but I'm sure, with your love and care, things will soon look brighter.
(When you say you sent two e-mails, I assume you mean to the university. I think, as Mishap said, the Office of the Independent Adjudicator is probably who you should take the matter to, particularly as you did not receive the courtesy of a reply to your e-mails.)