Terrible service (could use more colourfull language here)

Terrible service and interaction with MTN, I had a contract for over 3 years, I did an upgrade to my own detriment, they have taken over 3 weeks to give me an upgrade, and have led me down bread crumb trails daily, they promise phone calls back to resolve the issues, no one bothers to call back, they then decide to do a swim swop instead of a esim registration so now my sim card is no longer functional.... I have lost days of work as this is a business line, I have lost time and energy and money trying to resolve this issue, they then tried again to rectify the issue to only make it worse, they nearly sim swopped the wrong cell number which is my receptionists number and they would have left me completely in the dark if i didnt catch it quickly enough, avoid MTN and avoid their contracts, they do not care about their customers, as long as they debit your account it does not matter what happens on the other side..... I am livid, and strongly suggest everyone do their homework before going with MTN as i am not the only customer with terrrible service from MTN.... Highly dont recommend this company and i will be holding MTN liable for all my losses to date and inconvienience....