Continuous ***** on the part of MTN Mondo

This is my second review in one week regarding MTN Mondo. I remain perplexed as to how to resolve this issue. I have tried to cancel my contract and migrate to pre paid since 24 November 2021. MTN Mondo has billed me since, notwithstanding that I have not been able to use my cell phone since the 24 November 2021 as MTN Mondo linked my SIM card to a WiFi contract, hence my request to cancel the contract because of MTN's error. I have called on numerous occasions, the most recent being on Friday wherein I spoke with Maylene Faiza who assured me that she would revert by the end of the day. To no surprise, no return call was forthcoming. I was previously told by MTN Mondo that I would be reinstated for the billing, which is yet another lie, as they have just billed me again this month for a service I am not receiving. This is tantamount to ***** as I am being billed for a service not rendered whilst suffering as I do not have a cell phone. Stay away from MTN, they have no regard for their consumer, the customer experience or the safety of their customers. They do not even have the decency to respond to the influx of complaints they receive on a daily basis. If anyone has experienced the same and managed to resolve, please let me know as I suspect the only route to resolve is legal action.