VODACOM DOESNT WANT TO CANCEL MY CONTRACT

I walked into their store to cancel my contract, was told to phone their customer service number, which was the wrong no that I was given, I was then told to email them, got given wrong email address, so after numerous phone calls and emails. I am still waiting for any form of response from Vodacom. They refuse to reply to me. And is still being charged for a contract that has expired months ago.