LTE-A Network no longer available yet I have to pay for data I can not use!!!

I took out a data contract last month, LTE-A plan for R241 p/m. I received a bill and was debited R814, I called to find out why. I was told I was debited for two months and because I did not cap the data to R1, no one told me and it is not on the contract. I was also told that an additional 8 gig's has been allocated as out of bundle data to last until end of this month. Now problem is I have not had coverage since two days ago. when I search for coverage via their website, the LTE-A network is no longer listed at all, not that it is not available in my area, but not listed at all. Now I have paid for an additional out of bundle data which I can't use. When I called the call center, Technical support, which is supposed to be available from 7-11pm were no one to be found by any of the customer care consultants. Ultimately, I was told to cancel this contract. Now I don't see how this is fair that I have paid for data about R300 worth of data that I was charged for that I cannot use anymore because Cell C no longer has LTE-A. This is not my fault and I don't see why the financial implications should be mine. No one at the call center can assist me with anything but cancel your contract. This is absolutely unacceptable and ********, paying for a service that I can not use.