Intermittent connection

This problem has persisted on and off for over a year, and if there was any other cable or fiber option in our area we would simply have switched. 

We have drop outs of our internet service. It can last anywhere from 10secs to a few minutes and reconnects on its own. This affects both wireless and wired devices. Cox techs have swapped the line from our house to the pole, the line from the house to the modem, and swapped our modem now four times. We had a tech out this morning for this same issue again, he tested everything and said it must be the modem, takes it and installs a new one, and still we’ve had multiple drops in service after. I work from home using a program that requires connections to save my progress so this is constantly impeding my ability to work. I’m at a loss on what to do as the technicians you send out are no help, as they simply do the same as the last tech and nothing changes.