Still having crazy audio sounds and video picture problems-unwatchable cable and DVR

I was without cable and DVR for 6 days or at least unwatchable cable and DVR. Finally after waiting almost a week for the next available cox service technician appointment, I got the problem fixed on 12/3/15 at 3:30 pm but apparently it was only a temporary fix because once again, I am having the same issues-the audio and video going crazy and the signal undetected dialogue box coming on and off the screen every second for every channel.. Any help would be most appreciated!