Appalling Service From MTN

I had a contract with MTN for many moons. I then cancelled my contract and now recently I tried to take another contract with them and was advised that I am still appearing on their old system called Legacy. I contacted customer care and was advised that I NEED to send an email to their Legacy department to ask to be removed from that system into the new system. Now surely those should be internal processes that happen in the background and should not involve me having to ask to be removed. Are these not all supposed to be done by the company when they migrate from an old system into the new. Anyway I did same of which I was advised it would take 48 hours to clear to proceed with a new contract. It's now to date 3 weeks and nothing has cleared. I have escalated it with the branch I am trying to obtain a new contract from. Their Legal department since responded to the Sales guy and it's been 3 weeks still no answer even internally. Talk about appalling service. I don't even want to take another contract with them if these are the troubles I'm gonna be facing.