Onairtv poor service

I'm very disappointed with onair TV. They contacted me regarding the new dstv explorer of which I agreed and they came and installed it. After 2 months I experienced signal problem I took the explorer to dstv repair center, they tested it and it was working and they said because were i stay we use communal dish I must ask them. A Technician came and tested and he recommended My dstv explorer require multi switch and it should have installed with it. The Technician who came was surprised on how the explorer was working without the multi switch.I contacted onairtv and they brought technician came and fix it without the multi switch. I'm now experiencing a problem with the dish it doesn't have signal it's almost a week. I contacted them via email and they are not responding I also quoted the previous reference on the email I sent. I have to buy a multi switch for R850 and they were supposed to come with it.I just want them to take their explorer and dish.