Pathetic service with MTN

I have emailed the retention department to cancel my contract., two year contract ended. I received email from them stating that I need to call 135 to cancel and give them 30 days notice. Which after making several calls and they put you on hold and the consultant just cuts the call after wating on the line for more then 20 minutes. I called back the next day and spoke to a consultant who mentioned to me that my contract will end on the 14th September 2020 and I won't be able to use my no and this no will be issued to a new contract. I was given a reference no for this call. On the 15th September I called to check if the contract ias been terminated and was told the contract is still activated on my name. The consultant that assisted me said I will receive a call in the next 2 hours and I can chat to a retention consultant, up to now no one as called me. I wonder if this contract will ever get cancelled.