That's one of the most inept responses I've seen from a support person (or is it a bot response?)
#1 You need to determine the source of the power hog. Without knowing that you're shooting in the dark.
If you are on Windows 11 (not sure if it's in Windows 10) you can go to Settings > System > Power & Battery. Click "View Detailed Info" in the upper right corner.
Scroll down and you'll see what is using most of the battery. Normally it should be your browser unless you are doing a lot of gaming, video editing, or 3D modeling or other intensive activity. If it's not the browser, then contact support for the app that is using the battery and ask them why it's using so much battery and if you can do anything about it (or remove the app).
As far as the browser both Edge and Chrome have battery saving settings. The main one is the ability to sort of 'hibernate' browser tabs you have not accessed in a while. The term they use varies between browsers.
Also it could just be that you have an ailing battery. To make sure it isn't the battery itself do this: