Internet down every night around the same time and doesn't come on until late morning

My internet is down every night for a month around the same time. And it doesn't come on until late morning. I have the care package so I can have technicians come out for free. And they have come out 4 different times and these clowns from Cox still can't figure this *** out!! believe this month should be free for me but it won't. I would love any kind of suggestions or if anyone had the same problem. Any kind of help is appreciated.