Leaving my apprenticeship for university?

I'm doing an apprenticeship over uni and I love it, but don't expect to be getting paid more for doing more work. You're still technically learning and if you're capable of doing that work that's great, but you're still in training to them. If you want to go the uni route, go for it. If you want to go with this career though, you're gaining valuable experience and it's a great stepping stone and you are earning as you go, even if it is a small amount. Don't forget how expensive uni is and how you aren't guranteed a job at the end. Your apprenticeship might be crap to begin with, especially as you only started in September, but it'll get better.

I think you should tell the training provider about your problems with the company your employed to first. They can discuss your options with you and might be able to switch you over to another apprenticeship you're interested in. If apprenticeships aren't what you want to do altogether, tell the training provider you would no longer like to continue your apprenticeship and tell your reason why. I'm sure they'll help you out!

Also, if you want to go to uni, then go for it!

I get flexi time if I stay later, and the experience is good especially with the company in with. But it's more the apprenticeship side I hate and the fact they don't treat us as apprentices (I.e. Not giving us study leave)

I don't get study leave as an apprentice? I didn't think any apprentices did.

You should, literally all apprenticeships are allowed study leave or day release to study/go to college. Do you not go to college and study for your qualification?