POOR CELLPHONE RECEIPTION BETHAL

I am a contract customer with Cell C and since I moved to Bethal I have very little to no receiption. Data I cannot use at all at my home address. This querry has been ongoing since February 2015 until they suggested that I cancel the contract, ref nr ***. The financial impact when cancelling is huge and Cell C is not prepared to accommodate me on any aspect, ie, unused data bundles which I could not used due to the network, down payment of the handset for the remainder of the contract, available minutes which was not used etc. I have spoken to so many people, and had to beg for responses to my mails. Please assist