What do I do now?

Just has the day from hell. I’m meant to be admin and clerical apprentice in a GP surgery but all I do is reception. I never wanted this as a full job I done the level 2 and halfway through level 3. Recently my mentor is making my life hell by pulling me up in front of colleagues, saying my accent is too common for patients and bringing up every little thing. My manager is not much better and escalated this to the apprentice team which I thought would help. She did sweet F.A. and they all said that I would be better off walking away. I said that I don’t want to as I would be heavily sanctioned for employment benefits and I want to complete my course, and was branded selfish for that. I’m sorry but I have bills to pay and want to better my chances of a career. I’m already looking for another job but what can I do now?? I have no support at work, I’m miserable there every day and manager and mentor are useless A.F and the managerial team are also useless A.F! I want out but not pushed or made to walk as it will screw me financially and for future employment!