Disgusted!! No customer Service AT ALL

I bought decorder with installations but was registered to somebody else and the installer had used the voucher (installation) . Returned the decorder, where I bought the decorder they only had R399 and not 599 and I called DSTV to let them know and they adviced it's fine the installer can still installs for free as 1st decorder had free voucher. Installer installed,that was on the 7th July 2018. On the 1st Aug he called me and said I owe him R550 which he never mentioned it to me and told him I don't have it, I'll pay him on the 25th and he drop the phone. GUESS What, when I got home the installer "stole" my dish,had no dish called him and he said he took it,infact he stole it cz I wasn't at home and I can complain or open a case he dsnt care. Called call centre on the 8th Aug and explained what had happened and still no solution and it has been 2 weeks!! DSTV agents have been saying they escalating the matter for the past 2weeks and still nothing instead when I call I get rude agents. The installers name is Mandla Peter and last person I spoke to at the call centre was Siphamandla(team leader) I'm disgusted, disappointed and angry!!