dual sim phone whitelist #2

I have just tried to get help through mtn 135 customer service. I was left on the line for over 10 minutes waiting for the manager to come to the line. I hung up then when I called again the agent said her manager was not in the office. T hen i called again and the agent said her system is not working and i must call back in two hours. The other managers that have promised to help me are not in the office and the other one is supposed to call me back, but i have not heard from them. I have also sent a message online to mtn and they said they have sent a message for the supervisory team at 135 to help me, but not help so far. It has been a long drawn out waste of time for me to get my phone whitelisted. I keep calling and trying. Please help me get my dual sim phone whitelisted.