pooooor service

I really don't know anymore after months sending email and calling Customer care number to check why am i getting SMS notifying me of the monthly subs. I had a home Wifi from mtn of which it only worked for a day and i took it back at the branch "Cresta" that was in August 2024, today at 00.26 midnight I got text advising of the R280.50. To my surprise when I call they say I have insurance for three cellphones. I have cancelled the insurance on the 04/12/2025 still no confirmation letter till to date. what surprises me is that when you take a contract you concluding it with MTN there after that they will refer you to different places, now i received email from insurance stating the following. The insurance company ADMYNTEC SERVICE say i must ask for a tax invoice at mtn. Please be advised to contact MTN customer care on 083 135 or *** to request for your tax invoice. so no one is solving the problem the amount is going up in the mean time. I fail to understand who is no doing their job because to my mean and knowlegde i have cancelled both wifi Router and insurance. Already there is a pending unresolved matter... i think now its best i contact ombudsman as i have all papertrail.