bad service

I am very dissapionted in MTN. I have a contract at MTN wqith 2 lines.then my phone broke and in desember i went to do another contract as my upg**** was not due yet. as usual all my payments go off debit order. since new contract i had problems with mtn not debiting my bank account and now i am in arrears, there was always enough money to cover the premium. then covid happened and we could not go into town to pay, as well as i cannot phone as my phone is suspended. i also working part time now due to lay offs. i eventually went to mtn in welkom and they could not find my number on system. what is going on. and now they want to blacklist me. i am very unhappy with this. my number is ***.johan de villiers