MTN ***** - No feedback on investigation!!!!!

3 accounts were opened in my name early this year after I lost my ID in January. I was alerted about the ********** accounts at MTN beginning of September 2018 when lawyers contacted me about my failure to make payments. I enquired with MTN & submitted all required documents regarding the investigation but I have not received any feedback while I'm constantly receiving calls that I'm being blacklisted. I was told the investigation take 21 working days but 2 months later, I still have no feedback. This has me frustrated and stressed as it is affecting my credit record.