Poor service, false information, incompetence!

We were phoned by these people offering a deal for R169 per month extra which includes an Explora, a standard decoder, LNB, Installation voucher for R1075 to cover the full installation and that the installer would supply us with a new dish which is compatible with the Explora, all inclusive and at no extra cost to us. So we fell for it. BIG MISTAKE because once the Explora, decoder and LNB were delivered the problems started. First we were told that their installation allocation department was behind schedule and unable to allocate an installer for several weeks. Then we were advised by OnAir to find our own accredited Installer which we did. The Installer came to our house and gave us a Quote for R2800 for the installation and the dish which means that we are then liable to pay the difference. This was not what we signed up for! We were told by OnAir that the installation and the new dish would be covered by the installation voucher. We queried this with ON Air and they promised to sort it out. We are still waiting! OnAir is useless! Everytime we phone to query this their excuse is that they are waiting for a response from the Installer! Surely its a matter of just phoning them?