Disgusting service received

I am utterly disgusted at the level of service received from vodacom over the past months. I had submitted a cancellation request to move from contract to prepaid not realizing what a pain it would. The consultant assured me the contract had been cancelled and I took his word for it however, it is now September and I am still sitting with an active contract and *********** staff that constantly advice they would hand the matter over to a senior but the senior is always in "meetings". Numerous calls have been made on my part but to no response from the cancellation department of Vodacom. Vodacom has failed on many occasions to resolve what should be a simply issue but easily debit my account on time. Should this matter not be resolved soon, I will resort to legal action as I have clearly requested for a contract cancellation and the consultant had no issues understanding my request but failed to follow through.