Bad service BY MTN and Pinnacle Marketing

I am very dissapointed with the service given by MTN and Pinnacles narketing!!! :( .Portia Viljoen From Conplaint analyst i am also disappointed with you and your team,ive Cc you my e-mails but instead of you doing follow up with your team you don't care or bother to follow up,ive sent several e-mails to bulkblacklisting no response or feedback i am not even sure email provided its correct,no one knows the contact details for bulk blacklisting,whom should contact so i can get assistance?i have been complaining on Hello Peter but i can see it's pointless my claim it's pending just because i cannot blacklist the other IMEI number since my device my device was dual sim and i have been saying i have been using one sim on the phone,but now no way forward or because i am black hence i am not taken serious?i didn't plan for any incident to happen ive given them more evidence but now i have to do follow with everyone either im put on hold or my claim still on investigation or they need itemised billing WHAT SHOULD I DO SO I CAN BE ASSISTED????WHOM SHOULD I ESCATE MY QUERY TOO??