I suggest you leave /transfer to a different University/course and look for an alternative if you cant make the current situation work.
Think about what your end game is here? Wasting your time going to see solicitors is not healthy or a good use of your time, i don't see what you expect to gain from it frankly.
Further, if you want to sue a University, even with tens of thousands of pounds to do it, the case, if you have one would take years to get anywhere, long after you have gone, so i don't see the point, are you thinking you will get free cash out of it?
Go and see the student services and see if you can get on a better footing and pathway to success where you are. IF that's not possible then as i say leave and transfer to something more suitable.
You need to move forwards, just dwelling in negativity is not constructive. Sorry but you can only control your actions, not others. Good luck,