Extremely poor service Mtn

Well its been 4 months with Mtn failing to credit my account, this hiw things are, I’ve done an upgrade with mtn online which then toke me to mondo consultant who by then toke my order. After two months of an upgrade mondo delivered wrong phone of which when I realised I then toke it back to myn store and was give IRMS number( this was done in 7 days if getting this phone) niw mondo and mtn are failing to credit my account to nil. They keep on saying I’m owing them cancellation fee if R1650.00, I battle with them weekly and they still fail. Ref number RC*** confirm that cancelation was done by mondothis after hello peter was involved (great work hello peter). Now 5 months still mtn/mondo still fail to correct this. I guess consultant/ staff at mtn just enjoy taking lunch box to work cause really they failed or failing South Africa.