MTN poor service

Recently went to an MTN store and tried to take a contract. They said that i am on a legacy system since i had a contract with them last in 2016. This account was closed and paid for in full even though i had a dispute with them at the time. The store says that many other clients are being turned away because they are on their legacy system which does not allow them to process a new contract. Now people are being moved from the legacy system to the new system but apparently MTN does this in batches and cannot say when i will be moved. Totally ridiculous that clients who qualify cannot take out a contract.