R10 000 Penalty!

I took out a cellphone on contract with Telkom Mobile. After speaking to the consultant who assisted me I settled for an iPhone 6s Plus and I signed the contract on the 20th of December. Much to my dismay, I found out that Telkom Mobile does not operate in certain parts of South Africa and I was roaming on MTN while visiting friends and family in the North West Province. In addition, I had spent my allowance on data when I was under the impression that the contract I took came with 10GBS of data for the 1st 3 months.

I tried to cancel my contract telephonically and I was informed that I have to go back to the store. When I went to the store today, I was informed that I am not within the 7 day cooling period and there is possibility I may to pay R10 000 to cancel the contract and the cancellation team will only be available from the 8th of January. To say I am furious is n understatement, as far as I am aware a contract is only valid once two parties enter into it. I am more furious for the Telkom Rosebank store for refusing to take the cellphone back. Moreover, I am disappointed it was not explained to me that your coverage is limited to metropolitan areas. I feel like I have been sold lemon!!!!!!!