Help Needed. My internet goes in and out everyday, multiple times a day.

This has been a recent issue. Throughout the day and night, my internet just goes out. Wireless and Wired. For about 30 seconds to a minute, maybe even longer. It’s really frustrating because I got banned from my favorite game’s competitive mode due to this. This hasn’t happened before but let me tell yall what I did to try and solve the issue.

-changed routers and used spectrums router that was given to us (was using an Asus one and thought that was the issue but the spectrum router did the same thing so I don’t think it’s a router issue)

-reinstalled the coax internet cables that connect to the wall and modem.

-changed the modem and router locations to get more ventilation if overheating

Nothing seems to be working. Does anyone have any other tips to get it working? Before I call my ISP and request a new modem…maybe buy a new coaxial cable as well.