Unauthorized debit orders

Because of previous problems with African Bank I made arrangements to pay a certain amount every month via internet banking which I have done for the past several years. Last month African Bank put debit orders on my bank account without authorization which I reversed because I already paid them. Then today I noticed that they re-instated the debit orders for the full amounts which I again stopped. I have taken pictures of this and I have emailed Robert van der Spuy at African Bank and asked him to please sort this out as African Bank is sending me messages that they will take legal action against me for stopping debit orders which I did not authorized.