Legal status on up to date account

I have never defaulted on any of my MTN contract payments as per my current credit bureau record. I decided to pay off my both my contracts last year, an estimation of R11900 was made by MTN's retentions department. I paid all of it last year and both my numbers were migrated to prepaid. My credit bureau report reflected my MTN Account as paid up in November 2015. For some ****ing reason MTN decided to put a legal status on my credit report, this status was updated this year January. I noticed this today after checking my credit report, no one notified me on any listing prior to actioning it. Why in the blue hell did this happen? My account was paid up.