Contract deactivated

It will now be a year since this problem occurred, first I was being billed incorrectly by MTN for services that I was not receiving, no had subscribed to. After six months I had finally been given the credit owed to me by MTN. Upon receiving the credit my contract was deactivated immediately and handed over to a legal collection agency. Which I was not even aware of, until I asked them to unlock my line, to which I was told by the walk in care center will take 2-3 days and had been informed that my account was at their legal department. It has now been 2months and I am still waiting Mtns legal department to unlock my line. I have made numerous attempts with calls to their customer care speaking to their managers and to date no one has returned my call neither is my line being unlocked. I am now still paying for MTN original mess up and am not being given the service I am paying for no all the inclusive bundles that was signed up for.