Onair tv refuse client request for contract cancelation

I was duped into taking a media box contract under the impression that it comes with dstv channels. Upon connecting I realized that it was a lie. I called Onair tv to cancel this and was told I cannot cancel it despite being prepared to pay cancelation fees. I am now stuck with a useless media box that I cannot use and am told to pay for it for two years. Please be careful with Onair tv sales calls. This is unfair and daylight *******. I have written an email requesting cancelation and no one has responded to date. I am so disgusted by the behavior of this company that is hellbent on *****ing from us. Thanks Xolani