Loss of Connection and buffering

I need help please. I keep getting lost connection and low bandwidth. According to the test on the app, I've got good speed but that doesn't account for the buffering and losing the internet.  We did have flooding in the city, but this is getting bad. Can someone check the lines or the router - I've rebooted multiple times nothing is working. The AI Chat is not letting me add in responses and there is no phone number to call. I need help please