Get online support
Same with my internet, it was working perfectly fine then just stopped working today. All the lights are on but not the internet one, on my phone it says I am connected to the internet but it doesn't work. I really don't know what we can do , i tried resetting but it didn't work for me, you can try resetting your modem.
same with mine - the internet is non existent during the 8 AM to 6 PM during the weekdays and drops off quite often a number of times during the weekend and in the evening. Huge issue with work from home and school work. No response from TPG