Disconnects--Reboot-- all the time for the last Year!!!! What's up, COX get your act together

This is getting out of hand, for over a year now I have had Cox out 5 times, they have replaced my cable all the way back to the pole, and still I have bad service, intermittent at best. I have replaced over three modems and still I get disconnects. I am about ready to cancel my service with them!!!!!