Sound and picture problems

Sound cuts out for a couple seconds, picture gets pixel blotches. Problem is now on both of my TV's. It's so bad that I can't watch the program. I reset the box every 3 - 4 days, that helps for an hour or 2. I've been a cox customer for 16 years, up to a year ago my cable was flawless. It seems their total solution is to reset the box. I'm being charged big bucks for inferior service. They know there is a problem but lack the balls to admit it and the intelligence to fix it.