MTN - Incorrect Legal Status

I recently app**** for an additional line on my existing contract. On the MTN system I am rated as a "high value" customer. So understand my surprise when the application is declined.

Firstly, due to a Helios error it states my account is in arrears - not the case!!!! After numerous phone calls I eventually reach someone who advised that a cancelled contract, fully paid up, is in a legal status with MTN. This affects my credit score and my rating with MTN.

Furthermore, apparently I supp**** three different addresses in the last 30 days. When I wanted to update my address at the shop I app**** for the additional line they said it's not necessary??????????

Come on MTN, how do you explain that?????