Chuwi herobook will no longer boot

I have a Chuwi herobook only two weeks old and will no longer boot. I need instructions on how to get into the BIOs. I have a bootable USB Windows home USB stick but need help to make the BIOs see it or if there is no assistance I’ll send it back for repair

To start from the Windows pendrive, you must turn on, with the pendrive connected, pressing F7 intermittently until the boot selection menu comes out. There select the USB.

Note that you may have to press Fn + F7 so that you are pressing F7 depending on the laptop model

I’ve done this, and nothing came out. Also the “press esc to access bios” has disappeared, and now i cannot access to bios. What’s happened?