Switch back to previous HD DVR - DirecTV

I want to dump Gienie and reconect my old reciver. Years ago for our mountain home I picked up a Direct TV HD DVR at Costco, worked great! My wife passed away 2013 and I discontinued service. A year latter I signed up for service. I asked, with the new two year contract could'nt they just turn on the signal, I'd be set! BUT NO! They had to send a service tech out. I was told I could not use my existing unit and he installd Gienie, charges and all. (Did I get riped off or what?) Now the HDMI port has failed and had to switch to RCA nice HD! and the program guide is funky as well. Can I switch back and call in my old code switching to my old unit?

This question, "Switch back to previous HD DVR," is about DirecTV channels, programming, equipment, and sports.