I have a 6 DVR that started deleting all recorded shows Monday night

I have a 6 DVR that started deleting all recorded shows Monday night and AGAIN it deleted the next day recordings from Tuesday evening. I get up (Wed Morning) and they ARE ALL GONE!!! AGAIN!!!! 

If COX can't fix this, I'll cut my cord and move on to something else, I pay WAY WAY too much for this ** to be happening.

WHAT IS GOING ON!?? and FIX it!