Capitec debit orders

I am sick and tired of them. Thay are making unanotherised debit orders after one had already made payment arrangements with them. I hade a noth the en of August they took my money and again today. In the signed agreement say they my only take your money when a check is deposited into to your savings account if not then they should take payment from the account you have provuded and signed for not from a different account that you did not sign for.

I don't know what to do any more