Vodacom cancellation nightmare

Just another review on Vodacom and how they make it impossible to cancel a contract. Have been phoning them for 7 days straight to cancel a data contract. Each and every person promises me that it is cancelled and I will get a reference number. Needless to say, I do not receive a reference number so I phone again and again. Every day the I am told the contract will only be cancelled in 30 days. So every day THEY ARE NOT DOING THEIR JOB THE CUSTOMER PAYS. It is their way into tricking more money out of you the customer. WILL NEVER EVER GET A VODACOM PRODUCT AGAIN