Service delivery just terrible

Our household still have a multichoice old pvr. Since June On air TV is constantly phoning, telling us our pvr is outdated and that it needs to be replaced. Due to old age the pvr has been giving us trouble, and we thought it could be replaced. On the 4th of July the go ahead was given, and we asked On air TV for a few days, as we first needed to watch some of our taped programmes. The 2 pvrs as per deal were delivered, but we had to wait for an installer with a new dish, cable and lnb. Today is the 19th of August, and we are still waiting for installation. On air tv was contacted numerous times, but they never get back to us, nor are they sending out an installer. We have contacted 2 installers in our area, and they say they are not installing for On air tv anymore, as they battle to get payment. NOW WHAT NOW! After nagging us so much, they can't even come up with service. How pathetic is this, and they cannot communicate either. Multichoice need to look into this, as I do not really understand who is On air TV and if they are contracted by Multichoice to do marketing or whatever, but our situation needs to get sorted out immediately, as we are fed up.