Giving wrong contracts

Hi i went and app**** for a contract i waited a long time for feedback as i was promised it wil be quick after i was approved i didnt had my phone a week a staff member phoned that they gave me a wrong deal and that i must collect the right simcard yesterday i thought my debit order going off that a large amount of money was debbited when i phoned it was fees of a cancel of contract that the lady made a mistake now i have to pay when they submitted my fault i was being told 5 to 10 working days to get a refund i have stuff to pay if this isnt fixed with a refund within 2 working days i will contact my lawyer and this case is going futher it didnt take them 5 to 10 days to do mistakes and take my money please assist asap or this will be a case that will go futher and i will cancel all my contracts and open a court case