Poor Service

I did a telephonic upgrade in July. I specifically asked if the contract was over 24 or 36 months and was reassured that it is a standard 24 month contract. When I received my upgrade statement, it indicated the contract was 36 months. I raised this with Vodacom and after confirming that I was told it is a 24 month contract, the decision was made to collect my devices and cancel the contract. This was to be done by the 2nd of September. I contacted them again on the 27th of September and again I was told that the courier will collect my devices so that the contract can be cancelled. I am still awaiting collection and in the interim I am paying the monthly contract fee for a phone that I am not using. I have always been happy with the service I got from Vodacom, but this is unacceptable.