MTN technical support

Hi all,

Does anyone know where I can get directly hold of MTN's technical support guys? I can't go through call centers as I doubt they would understand the problem I'm having.

FYB, I need to do some trouble shooting. I got an Afrihost sim and my Hauwei E392u-12 LTE modem fails to register on their network so I can't connect (on neither EDGE, 3g or LTE). I've got a Hauwei E1820 which works perfectly with the sim, but no LTE of course. At the same time, I've got a CellC sim and Vodacom sim which works perfectly with the E392. So for some reason the E392 and Afrihost sim is bombing out.....

Thanks!