Vodacom do not live up to their cancellation polic

In July I took out a new contract which I was not happy with , the phone was not what we needed, after numerous calls for them to arrange collection we finally got Step 1 right, the phone was collection on 3/08/2015. to date I have had no help from anyone with regard to when the cancellation and refund will go through ... That was double charged to begin with as the new contract was meant to be a ported number and it wasnt..... Its now the 17/08/2015 and no response from numerous call agents that I have spoken too who promised to give feedback with in 3 days..... on Thursday I got through to a supervisor who Im still waiting to hear from.... I currently have 4 contract with Vodacom and pay over 1000 a month...... Im ready to leave Vodacom and move to another service provider as seems they are all as useless as the next !!!I just want answers and my refund now !!! IVE HAD ENOUGH!!!