Decoder already assigned to another Subscriber - On Air Unable to resolve.

I received a call from On Air Tv to lure me to purchase an explora decoder to which I agreed. It took them forever to deliver and eventually they delivered. I wasn't happy with the time it took them to deliver. I installed the decoder and when I wanted to register it I was told by DSTV that the decoder is registered to another person and I had to contact on Air on that Saturday Morning. I spoke to Barnabas Pillay who told me that management will contact me at 12h30 because they were still in the meeting. I learned by Michelle McKenzie that Barnabas was lying because they close at 12h00 on Saturday. Michelle escalated but there was no response, I called again and spoke to Christina Girbhari and she also escalated and told me someone will contact me and no one did. I called again this morning and spoke to Sumeshan Munsamy and he said he is escalating and management will take care of the issue and he will call me back......I am still waiting for the call to resolve the issue. The service I am getting from On Air TV is terrible ands I do not wish anyone to go through this painful encounter.