Comcast is really discouraging me and bringing down my money farm.

Anyone else sick of horrible treatment from cable companies? All I want is my exfinity wifi to function properly. The extender was working fine if they could just get the router to stop resetting every 6 hours! Anyone have any suggestions on having great wifi in New Hampshire? I need 50 devices and up to run on full signal. Damn you Comcast for making me have to call you again tomorrow!!!!!! That Long condescending phone call!!!Ugh!