Handed over accounts nd no trace to clear my name

I had a Contract with MTN nd i collapse in payments nd I was no longer working, later I start working and I want to make payment arrangements then I go to their branch they explained that I am handed over to Vericred, I emailed nd called Verocred they told me they have no record of my details so I went back to MTN they told me we given ur account to Verocred so MTN South Africa where should I go coz I want to do right and clear my name from. Bad record?, I am not the only 1 who went to Complain to the branch and we don't get any help but just run around nd calling 135 the whole day nd the legal department that doesn't respond calls even if it's the branch telephone number calling, now where do we fix our record Mtn please we need ur respond nd how we would get help coz we many not 1 please help us MTN South Africa management/Legal team