Case not being resolved

I opened a case (***2) after i had purchased the 20G data bundle valid for six months and later realised there is no coverage in my area. I bought the data in Dec 2015 and have in contact with Telkom since then and they have failed to resolve the issue, coverage issues are not resolved overnight so i had requested a refund on the bundle since i work from home and could not afford to wait. Telkom have been insisting on meaningless exercise which are not going to help me in any way. The bundle expires in May and i still havent been able to use it. I would like to be reimbursed for the service i paid for and Telkom has failed to provide me with that service.<br>