night mare with mtn

its 3 months later and still no response from mtn ive tried mailing, calling and going into the blue route store where the sim swop was done and still no luck with getting my number back on the mtn network . no return phone calls from mtn and my business is suffering as this is my contact number i use for business yet every month i have to pay them quite a pretty penny as i have 6 other contracts with mtn and if i dont pay they simply disconnect all 6 lines. i am so fed up with mtn its just not true as they either off line or just put down or drop the call when i complain. i really dont know what more to do as i feel im living in a nightmare and mtn just simply ignores the urgency of this matter