Funds transferred with knowledge or Agreement

Credit card division called, I asked them to call me back in 15 mins they never did then an sms comes through and says monies transferred of R3940. 00 from my savings account to credit card which wasn't what I agreed upon nor said I could afford. I could only afford R1000 a month via debit order. They have now deducted monies which were going to other accounts as well so now those accounts are going to be short paid as well which I have agreements for as well. This is not the first time this has happened. The consultant should have called me back but he never did and I was not aware of this large amount being taken off my account. I could only afford R1000 per month and they have taken over triple that amount off now I can't pay my vehicle or other accounts.