Unsatisfactory Service from MultiChoice

A few weeks ago, my husband received a call from On Air with a deal for an Explora and Xtra View decoders at no additional cost to our original PVR Dual Decoder. Upon installation, every thing worked well for about 4 days. The Xtra View Decoder kept on sending error signals. We have contacted MultiChoice on numerous occasions up to 5 fives a days in some instances. The problem has been escalated almost as many times as we have phoned. No amount of phoning or escalating seems to be helping our course. We have now been without the Xtra Veiw since Saturday and are still waiting for a technician to call. We phoned again today and gave them until 20.00pm to get back to us or we would be contacting you, needless to say we are still waiting for their call.