POOR SERVICE-NOT EXECUTING CLIENT'S REQUEST

On 22/10/2015 I phoned CANCELLATIONS in order to cancel an existing contract. The amount due -R3622.79 was transferred to Vodacom on the same day. All documentation was e-mailed and receipt was acknowledged with ref no. EC-OXNM-28AEDH. At the beginning of Nov I received my bill and the fee for the cancelled contract was still billed for November. I thought Vodacom needs more time to execute my request and waited for my next statement. On receipt of my Dec invoice, the contract still reflected and NO refund. On11/12/2015 I again spoke to the call centre.(William) and was requested to fax all documents again...which I did. (Ref no EC-OXSV-2LXA1E ) After no response from Vodacom, I phoned them again (Itumaleng) and asked them to investigate and PLEASE come back to me. Today it is 22/12/2015 and no response whatsoever !!!! What now ??? Another fruitless call to the call centre to speak to another *********** person ??<br> Do you think I have the confidence to do future business with Vodacom ????