Horror after horror and no help given

I have multiple issues with mtn for a while now, first we start off with for some reason a few months back my capped amount of R1 per contract above its allocated amount just changed and I got charged 6000 rand above my normal rate, went in had this fixed and reset to R1 but I had to pay the 6k,then they stopped sending me my statements (been in 4 times to have this fixed and still not done), then I've had my wifi contract for over 3 years now and even during the first 2 weeks of the pandemic I streamed all day every day and I've never been able to finish my allocated data on it, now for June and July I've finished it in the first week! Furthermore my night time data has also just "vanished", and I did change the password end of June just incase someone somehow got it, been disputed no result, furthermore I have 2 phone contracts that have expired that I can't cancel, for some reason my number has been delinked from my profile by them and I call the number give, enter the number I'm trying to cancel then the process starts over and this repeats over and over and over with no result, can't even get through to speak to a person!