No coverage on unlimted package

No coverage on unlimited package in my area. According to call centre, should not have been sold this contract.Logged a case no: ***2 at the Telkom Mobile store in Walmer PArk on the 22nd of January to get the contract cancelled. They said they would send out a technician to confirm if there was no coverage and if so that I must hand in the device, my number would be moved to prepaid and I would get a full refund for the duration that I was on the contract. Technician came to my residence and confirmed that there is not sufficient signal. That was 2 weeks ago.Still have heard nothing from Telkom Mobile.Have escalated this twice at the call centre and still no comeback. Here are other cases I logged prior to this one: ***8, ***4,***4. This is getting pathetic now. All I want is this contract cancelled so that I can move to a proper service provider.