Ongoing unresolvable nightmare

I'm coming here in the hopes that MTN might help me make a payment to them for my account which I have been unable to do for over 6 months. There is a technical issue with the reference number they've given me which has made the last 6 months of payments not go through after years and years of successful payments. FNB tells me that MTN removed themselves from the global address list without notifying anyone. I have tried everything to make manual payments to no avail as the information MTN keeps giving me is not accepted by the bank and will not go through.

I have phoned MTN in excess of 20 times, sat on the phone, spoken to multiple people who just give me their ABSA banking details with another incorrect reference with the bank will not accept. Their other option is that I drive to PEP and stand in a queue to pay my accounts from now on. Are you actually joking? Every person I talk to has no consequence for not solving the issue, so when they dont know what to do they just hang up, knowing that there is no consequence for doing so, leaving me to start from scratch or transfer me to a **** "technical" department which is never answered. There is no repercussion or follow up with anyone in their call center so there is no need for any of them to actually assist or problem solve. There is also zero desire. I cannot escallate, if you ask they end the call.

I have mailed customer care, collections, and every other possibly account I could find trying to get assistance. My mail is NEVER actually read or resolved, a copy paste message is handed over and then the mails going forward ignored.

I have had an MTN account for 25 years! How is it that I'm sitting here unable to get my payment from my account into MTN's for 6 month and have no way at all of getting anyone from MTN to assist despite the HOURS I have wasted trying.