Gemini will not open apps

I got the Gemini to use with my Genie in December. In March it stopped loading or opening apps. It says there is a problem with HBO or that there is no internet connection. After two days of unplugging and resets and hours of DIRECTV support calls they decided the unit was defective and shipped another. I set it up, reloaded and signed into my apps and it worked for ONE day. Now we are back to the same old endless circle spinning and frozen screens…but if I switch to the Sony smart tv or AppleTV apps open instantly. My internet speed is 100+MGPS and the DIRECTV test shows the connection is solid and speed is excellent. What now?