Bad service

I saw the new package deal on TV for R899 a month for the new explorer. This includes the decoder, all channels and installation. They phoned me and told me the decoder will be delivered to my home in a few days. After a few days I received a call that my decoder will be delivered on that day. I gave my domestic worker's number for delivery. She waited until 6 pm. No delivery. The next day I phoned and they told me my decoder was delivered to a person who doesn't even have my name. They said they will check with On the Dot delivery company. They could not trace it. Nobody phoned me back for 2 days. Two days later someone down my street phoned me and told me it was delivered to him. The installers who install this for Multichoice installed the decoder and could not test it. Even after I received the sms days before I received the decoder that it was activated. The smart card was activated 19 January. Today 27 January my dstv is still not working. I phoned multi choice and they said it's not their problem. The installer promised to come out today 27 January. Nobody came out. I have spent more than 3 hours on my phone with this product. I tried a supervisor. He didn't phone me backt