Contract closed more than a year ago, but im still billed

I went to apply for an MTN contract on the 15 December 2017 at the Cresta branch and was assisted by MOE. After completing the application I was informed by Moe that he would contact me between 2 to 24 hours. I waited and the call never came, I then contacted the store after 48 hours and was told that Moe was busy, however my application is still on review. I called again after 3 days and left a message for Moe, still no response.

Today I called again after 6 days of no feedback and Vicky answered the phone. She told me that my application was declined because my account was with legal. This is now the first time I receive a response since my application.

I am now shocked by MTN because I paid off every cent of my contract before moving it to be prepaid. My contract came to an end more than a year ago, I then paid it off and decided to go on prepaid. This would appear to be ***** because I do not owe MTN anything. The showing part is that they tell me my account is with legal, so more than a year no one has ever contacted me.

This appears to be ***** and very worrying as I was never aware of it. I would like a proper investigation to be conducted with no further delays, I do not owe MTN any money. Since my last contract I have been on prepaid, its impossible. My number is **********