Unhappy consumer

I have 2 bank account Capitec and Standard so if you have a debi check running on Capitec bank the creditor can change the amount when and how it pleases them ( Capitec) without my permission they have deducted a double installment without my permission without informing me and what make matters worse is Capitec bank cannot dispute or reverse it on my behalf the creditor has grayed the option out . I it is the first time I have seen that a creditor has control over a banking system . I have asked BDF to cancel the Capitec debi check and run it from my Standard bank account several times and upto now they still havent done it . The lady in the branch keeps referring me to their head office and the gentleman in the head office just ignores my emails. Debi check is not a good way to go if and when you have Capitec account and the creditor refuses to cancel it. Be careful people .