MTN just do not care

I was a customer of MTN and have been for many years. At the end of a 3 year contract things went horribly wrong, I was paying R1200 per month and stopped making payment after 33 months as result of the incompetence of MTN resolving urgent genuine matters that directly affect my business. I was getting 10gig data monthly which MTN just stopped abruptly because the special ended and was done without any notification. I immediately signed up for a data package which MTN neglected to put into effect. I sent a lot of emails trying to resolve this matter and never had any reply to the numerous complaints. Eventually I sent an email to say I will make no more payments until the issues are resolved. MTN blocked my number without giving any effort to resolving matters and now I was listed for default on Transunion and a written off date given as 24/2/29 account BA*** in the amount of R3782 which is basically the last 3 instalments of the 36 month contract. The tactics used by MTN to resolve issues is to block your phone and listing you on ITC and putting no effort into client relations at all. You are a small fish and they have enough business going round so they don’t care that it is unfair.