They dnt stick to the law

The company deducted more than 12k in my account. I am paying 1700 and they took all my money.I am at the branch now Cecilia at Head office does not want to refund my money. Monica who is at the branch in bellville is very rude and they are telling me there is no manager. I have never see a company that deduct more than 2rimes I. someone's account I did not approve any debit check how they did it I dnt know.