Unsatisfied customer

This company has not been good to me. They made a mistake with my credit card payments. They have been paying it into an incorrect account. I tried to call them and make them aware of this and they promised to help, till today they have not sorted it out. I am losing money to some account I do not know because they have been paying to it. I recently had my bank account debited by the bank for non payment of the credit card. this too was reported to the company but they still didnt sort it out. Please help, how do I make the company reimburse me and fix the account number issue