Vodacom contract

I called vodacom cancellation department to cancel my contract. I was told I was owing hence I should call accounts will be advised how much to pay so that cancellation could be processed. I did that paid what I was told to pay, call cancellation department again .Agent then proposed for new package after he canceled old package which I couldn't resist. But I still get my old package which to my knowledge it had been canceled called vodacom on numerous occasions was told it was system error but still no solution to date