Poor administration

I have changed my banking details from ABSA to Bidvest in the month of March 2018. I contacted DSTV on the 29 March 2018 inform them that my banking details has changed and to updated their system with my new account details for my debit order to be deducted monthly. During the month of May they disconnected my services twice due to non payment. I contacted them again and they requested from me to make a cash payment at ABSA in the meantime so that they can switch on my DSTV account which I then did they in return then assured me that they will escalate this error to their technical team to sort out the problem once and for all and that they will get back to me as soon as it has been sorted out. Guess what end of May came and the installment was once again not deducted from my new account. This will result in me having to pay a double payment once again this month or I will be disconnected again! Surely someone at DSTV must be able to sort this problem out once and for all now?! I have never skipped an installment with DSTV this only happened now since I changed banking details and the saddest of all is that this is not my fault. I don't want to be listed as a slow payer and therefore would like DSTV to sort this out A.S.A.P.