Terrible Customer Service - VODACOM

Vodacom has outdone itself once again. They have previously forced me to pay and cancel a contract I was dupped into taking. Upon paying the cancellation amount and sending them all the documents required on the deadline they wanted, they still invoiced me for the cancelled contract. Furthermore, when I took the matter up with them, they had the nerve to ask me for new cancellation date. Needless to say, I didn't agree to it. It's been two weeks since they said they are looking at my case and will come back to me. I am still waiting. Hopefully they will cancel the contract and refund me the money the invoiced and debited from my account.