Horrible interner

I have lived here for a year, EVERY day my internet cuts out and back in, recently it’s been every 5-10 minutes. I have talked to tech support multiple times. Two days ago the rep said that it was problem from the pole to the house. Today the tech came our, ran tests, and said everything was fine and I needed a new modem, which I got last week, after waiting for an hour, getting a cable box instead, and driving back. The tech said it would be $100 for him swapping out the modem/router. ONE PLUG AND ONE COAXIAL CABLE. I have paid for this service for over a year and it has never worked. 3 modems and no progress. After the tech left today it worked for 6 hours, and just now it cut off. I am at my limit. WHAT DO I DO?!?