MTN - Lack of customer service

I’ve been trying to do an upgrade at 3 different service centres, online and via the call centre. Every time it’s a different excuse, either the account is with legal department, or it’s still on the old system. Last week I was told at the Clearwater branch that if I come in after the 5th they account can be moved to business like my other account in order to get a package that suites my needs. Again, I am sitting in the service centre with ALL kind of excuses under the sun. I’ve been a client for many years and not once did I miss a payment, should I rather consider closing my accounts with MTN and move after so many years?