Vodacom the worst cell provider ever

Attempting to cancel data contract since January. Multiple calls - receive sms each time to say contract is not cancelled until I receive sms or email confirming such. Get told will be processed within 24 to 48 hours. Then get told it takes 7 working days. Now at two months plus and still not cancelled. Still debiting my bank. Most shocking business practice. Will never use Vodacom again if I can help it. Pity I still have a cellphone contract with them that will incur losses if I cancel now.