Breach of Contract - delivery of s****ped faculty products

On-air TV contacted me with a special for 2 explora decoders for a discounted price in return for my old decoder. Since receiving the new Decoder and the installation thereof we found that the one Decoder and smart card don't pair. On investigation with DSTV it was found that the decoder provided was s****ped and could not be used. I have since reported the problem through the On-air TV call centre and since made up to 6 follow up calls only to be told that the query will be escaped and I would be called back. To date I have received NO feedback despite the problem being reported more than a month ago. All the consultant says I must wait 72 hours further. The consults are INCREDIBLY RUDE and dismissive. They won't allow you to speak to anyone else higher up and I have NO way of reporting this disgusting service and what is clearly ********** products. I would advise any prospective client to run in the opposite direction if are approached. DISGUSTING AND SHAMEFUL!!!!