Reconcile BA*** and send updated statement

I love MTN, however the service I have been receiving for almost a year has been disappointing. I made payments as per payment arrangement April 2023. Since then I have not received an updated statement reflecting the payments made. Every month I enquired and get no response. Once I submit proof of payment they go silent. The account is handed over even though payments were and is still being made. I submit all proof of payments to the company the debt is handed over to and they themselves respond with, we are not sure why it is not updated but we have received your proof of payments. The they go silent too. Next month a new debt collector same process and once I submit proof of payment they too vanish. Next month new debt collector... There has been many. VVM, CSC, CCS, Nudebt and and, but once I submit proof that I have been paying they go silent. I reach out to mtn to request updated statement, they request my details and POP, I submit all and then... Silence from them too.

Where is the monthly payments I am making going? Who will be paying debt collector fees? Why can I not get an updated statement? When will this be rectified? Why the silence after I submit proof of payments?

When will someone from Mtn fix this matter? I have called so many times and spent so much money holding on just to be told they will get back to me, which they don't.

Please assist