More than 6 weeks to change debit order details!!!

I changed bank accounts and made the change on the Self Service DSTV website to try around the middle of September. Since then this change has not been effective. I have received multiple emails regarding the escalation of this issue and assurance that I will be called to resolve the problem but have not received anything since 29 September. It is now 26 October and the change of bank details is still not effective and no one has called me to update me on the situation. I called the call centre on *** and Nompumelelo answered the call - she could do very little except provide excuses for why it has not been resolved and again assured me that I will be called regarding this (although I cannot believe that this will happen after the last experience). There were also no supervisors available to talk to with no good reason for supervisors not being available. I find it unacceptable that all I want to do is change my bank details to ensure that DSTV gets paid on time yet it is so difficult!