The MTN call center and branches have terrible customer service!

Three weeks ago, I switched from contract to prepaid plans, but my number is still inactive; I am unable to purchase data or receive calls. I called the center multiple times to have this issue resolved, and each time I passed from one person to another more than five times without receiving a solution. To no avail, I have emailed the appropriate MTN departments to have this fixed. When I eventually decided to visit the MTN branch, I was informed that they would escalate the situation and resolve it within 48 hours. I visited the branch four days ago, and the issue hasn't been resolved. I'm dissatisfied with their service; they act quickly when someone is overdue on payments but take a long time to provide quality assistance.