Cancellation on a contract denied

Vodacom policy allows contract cancellation within 7 days after effective date. But I have been denied contract cancellation within that 7 days grace because investigations had to be completed first, which took over 1 month and half. Even worse investigation was done on an incorrect cell phone contract. Lack of communication of updating me about the case logged, no feedback at all. Bad service from staff, 7 Vodacom staff failed to call me back as promised.

I want the contract cancelled.