Please help crying eyes out can't stop

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Hi where I work as a apprenticeship there are two sites and they are in separate places I used to work at site a for over a year and as a lunchtime assistant where I done so much over time to help them and have now been recruited as a apprenticeship and have been moved to site b with no choice they just asked me to try it I absolutely hate it .i feel like they've stabbed in theback completely taking the piss out of me I've asked my Line manager to move back as so unhappy and want to do the best and feel only can at site a as there so much experienced I will get a good role model she has said she will ask but can't promise anything but so upset can't stop crying dont know What else to do if they say no so stressed