Utterly useless call centre staff !!!!

I called Vodacom beginning of Nov'15 about the poor signal and reception I have at home. Moved to upmarket area in Boksburg in Oct'15. Their Network department called back to say there was nothing they could do for me and requested, to which they agreed to cancel the remainder of my contract period. NOTHING has been done since then. I have called about 15 to 20 times speaking to call center staff to push through the cancellation of my contract. NO-ONE has a clue what the hell is going on, and every time I get the promise of them looking into the matter and will call me back! NOTHING !!!. In December I called saying I want to settle etc and said I would cancel my debit order if I heard nothing from them. Which I did. I'm not going to keep paying the monthly subscription if they agreed to cancel my contract, yet I have to keep paying them until such time they decide to finalise this matter. Last week they decided to cut my number, without a call or message to say what was happening. I have kept trying to follow up with Vodacom without response. I'M GATVOL !!!! I'm told my number has migrated to another department, 3D / 3CG ???. Still can't get hold of anyone.. I've tried !!!