Poor service

I purchased a tablet from Vodacom, Brookside Mall on the 20 June 2015, I was told it would take 24 hours for the SIM card to be activated. Ten days later and my service is still not activated with my bank account already being debited. Numerous cellphone calls and a visit later, the staff have passed the buck and even the manager has not honoured her word in getting back to me after she picked up my tablet from me. I use my tablet for business and this is an inconvenience. I would like my contract cancelled due to poor, unprofessional service, I choose to remain with MTN who provide professional service.