Internet drops randomly and frequently

So for a while now i’ve had random drops in internet while gaming at night which wasn’t too bad. however, starting about 2 weeks ago these drops are happening throughout the entire day and effecting everything connected to the internet whether it’s hard wired or wireless. i’ve had 2 separate techs come out (one just left about an hour ago because we thought the problem was resolved). the first one changed the modem 3 times and it worked for about 2 hours. the second one changed all the fittings on our coaxial lines and that gave us better speeds so we assumed it worked. but the problem is happening again. everything loses signal and the tv’s begin to freeze until it’s back. the light on the modem also stays white like if everything is working fine. i don’t know where else to go from here.