WORST SERVICE EVER

I cancelled my contract twice already and still it is not cancelled. I am on the verge of cancelling all my contracts with Vodacom and go some where else. How many times must you phone and cancel a contract and in the mean time we have to keep on paying for something the we dont want. Today again I phoned to cancel and the lady said she did cancel it and I will receive an sms and email. Which up until now I did not receive. Worst service ever.