Bank change

I changed my banking details two weeks in advance with absa vehicle and asset finance to deduct from my new bank account. They sent me confirmation of banking change before debit was due. On payday they deduct from my old account which left me with a bank charge of R150. I then call them and they say I must pay via eft for this month, which I did, two days later they send me a sms notifying me payment is due, again I call them and the consultant confirms that they have received payment. Today, they try to deduct again from my old account, another R200 bank charge for a failed debit. What the hell is wrong with these people!!!! Really poor service!!!! And now who must pay these bank charges for their incompetence!!! Super irritated at this point