Cancellations department is pathetic

Not worthy of 1 star. I am trying to cancel my Vodacom ****le and because I was unable to hear the person on the phone (due to Vodacom's poor signal), they said I could email them to process the cancellation. I have emailed the said email address 3 times, with no response whatsoever. I then emailed the customer services address, no response. In the meantime, the ****le is active but is not linked to any account for payment...