Mtn
Mtn subscribers cannot phone me

After moving my number to cell c on completion of an mtn contract, no mtn subscribers can get hold of me on my cell c number it says the number does not exist on the mtn network, i have tried through autopage cellular, to get them to recognise my number, it has been like this for 6 months now, i think this is ridiculous. how is this corrected? i still have one number with mtn but not for long im sure