MTN - NO customer service at all

My son's phone was ****** and the wrong device was blacklisted.

I made an affidavit and sent it, together with a certified copy of my ID, to: ********** ********** ********** ********** on 2 January 2019

and AGAIN on 7 January 2019 to **********

I did not even count the number of phone calls I made to customer service.

Today is 14 January 2019 and the matter is STILL not rectified!