no dvr/frozen dvr

I had cox contour installed about 30 days ago and the system has never worked as promised. I have 3 boxes. The main TV signal/dvr seems to work fine. . On the second tv, the cable channels work ok but the dvr plays shows for only a few minutes and then freezes. After a few minutes the frozen picture disappears and the cable guide comes back but says no channels are available (error 3.1.1.1) for an extended period of time and then suddenly the cable channels work again. The signal on the third tv is always weak (pixelating) and the dvr has never worked (saying the home dvr isn't functioning with error 2.1.2.9). I have tried rebooting everything and nothing changes. So i am paying $300+ a month for a system that does very little to nothing that was promised. I have direct tv in my RV and it works so much better. I have been a cox customer at home for appx 30 years and never had any real problems until I "upgraded" to the contour system. I am very frustrated and considering having them take the whole thing out and starting over with a satellite company.