Onair TV billing without agreement

I was called by Onair TV people towards the end of August to offer me an Explorer DSTV and a normal HD decoder on a affordable package and I agree to it. On the 2 September 2015 both decoders where delivered to my house and I was ask to call the technician for installation, when the technician arrived he said he won't be able to proceed with installation because I didn't have a old PVR. What ****es me off is that Onair TV are charging me for something that is lying in my kitchen. I've been calling this people every month to come and pick up this decoder, cancel this sale agreement and bring my money back. What irritating me most is that the person who called to offer me this package he did not explain everything to me as he was supposed too, he offered me a package which I don't qualify for because I don't own an OLD PVR that Multi-choice announce to for recall.<br> <br> Onair can you please cancel this sale agreement and pay my money back.<br> <br> I don't want to talk about how rude Lerato your call centre stuff is, just don't want to waste my energy.