deducting debit orders without my permission

on 05/02/2016 I phoned Absa with a complaint of a debit order being deducted off my account. they said I must reverse it inside the bank as they cannot control this debit orders. I did reverse it in the bank and I must carry the cost of reversing debit orders. again today this company deducted the same amount. when I phoned Absa again they gave me a number *** and cannot do anything once again. this is a service provider that deducts the money and the previous number was Durban number. I phoned this number but gets through to a voicemail. I am sick and tired of asking for assistance and the only reply is that they are working on this problem but I must pay up every time. this reflects bad on my name. I do not have the time every time to go into the bank to reverse unauthorised debit orders. in short I need this resolved ASAP or I will have to close my account that I have for years with Absa. I cannot continue to pay and they just let the debit order go off without my permission. this is the second attempt in almost 2 weeks they deduct and Absa cannot help me to block them and do not bother to carry the cost. I am done with Absa if not resolved in a week.