MTN's unacceptable service only causes pain & frustration

My experience with MTN has been extremely frustrating since 1 Aug 2022. They don't even deserve a one star rating! After numerous email & telephonic requests and reference numbers, one of my contracts are still not migrated to prepaid after it reached the end of it's term. MTN has migrated the contract to a "zero rated top-up" although this was NOT my request as per all my mails and telephone calls. Then they still charge me for this contract that I Did Not request. They are just ignoring my emails. When I speak to the customer service consultants my calls are being cut off. I just came off a call now that was cut/dropped again. I would just like MTN to please please please honour my request. It's a reasonable request and I honestly don't know what to do anymore? Please assist me to get MTN to honour my request as I will never recommend them as a preferred provider at this point in time.