Bad service

I am not happy about their service,i recently took a contract with them through telephone and when the package was delivered the terms of the contract were different than what I accepted interms of the {data, payment period} and when I reported this for Investigation the results came back saying that all this I am saying is invalid which is not true( I dnt know how they adjust their recordings bt I am really not happy about this). I have been going back and forth with regard to the Metter to be resolved with no luck rather than to cancel the contract and pay the huge cancelation fee.