Playback, On Demand and name a few - DirecTV

I've had DirecTV for 16 years, but I've had nothing but problems the past 2 1/2 years at my current residence. Playback and On Demand features don't work and, on a good day, Pandora might play one song and then it loses it's connection. Approximately 6 months ago, DirecTV came out and replaced all of my equipment; however, the problems continued. When I troubleshoot, I have a Wi-Fi connection on my iPad and cell phone, but the DirecTv screen shows the connection is disconnected. I've relocated my modem several times and nothing helps. I've also reconfigured the modem with my provider. Does anyone have any suggestions?

This question, "Playback, On Demand and name a few," is about DirecTV channels, programming, equipment, and sports.