MTN - Inability to cancel a contract properly

Good Day. On the 16th of Jan'25 I cancelled my home wi-fi package. I spoke to Cynthia in the cancellations dept, REF NO: *** who confirmed my wi-fi package is cancelled & I would only have to pay the last account at the end of Jan'25. On the 18th of Feb'25 I received another account via email, which included the account for the wi-fi that i've already cancelled. So I called MTN again to follow up on my cancellation. I spoke to Noxolo in the billing dept, REF NO: *** who informed me that he can see it has been cancelled, but I still have to pay another month's account at the end of February'25, which I also paid. Today, the 19th of March'25, 3 months later now since i've cancelled this wi-fi package, I AGAIN received another bill for this cancelled account. So I called in to MTN again & this time spoke to Mandisa Maphumulo in the retentions dept, REF NO: *** who also told me she will make sure this is cancelled properly & promised to send me feedback before the end of business on the same day & guess what, I AM STILL WAITING!!! I have been a client of MTN for around 20years & I am more than ready to cancel all my contracts with them even if I lose my number, it will be worth the pathetic service. And I'll be VERY SURE to advise everyone I know against using them as a service provider...