Contract Query..

I cancelled the contract on 30 july 2018. On the 4th of september my phone lost connectivity up intil now.. i have called several times at the head office to try and get this matter resolved but all i hear is the same unsatisfactory response. I cant afford to lose my number ( ********** 037) as it is very much associated with my business. Its been a month now with a dead number. This is unacceptable. I never expected this to happen as im a loyal tfg customer. Please help me get my number back. Please. The alternative number i gave them to call me on is ********** 363. MTN said my number is still being held under one2one contract , and one2one consultant said it MTN that experiencing technical problem that they taking yoo long to respond to their queries.. i cant understand whats going on now I JUST NEED MY NUMBER BACK