TV is almost unwatchable

Ever since Delmarva Power & Glo Fiber internet both performed work in my neighborhood the Xfinity TV service has gotten so bad it's not worth a fraction of what I am paying. Every 5 minutes or so the sound mutes, the picture freezes, the screen goes black then everything returns to normal. I have to restart the cable box about 4 times per week just so I can change channels. It's getting very annoying & aggravating.