Im stuck on undo can not cancel or get to menu

If you are saying your remote has stopped working...

1. Have you tried charging the remote.
2. Have you tried pressing the menu and up button for a few seconds while holding it an inch or two away from the Apple TV, if successful you should see an onscreen message saying the remote has been paired.
3. If you have an older remote from an earlier model Apple TV or MacBook, you may be able to use it to restore the Apple TV which in many cases has been enough to re-enable the Siri remote. You will need to complete set up to undertake a restore.
4. If you have a USB-C cable you can try restoring it by connecting it to iTunes on a computer.
5. If you have tried all these steps, don't have an earlier remote or a USB-C cable or using them is too inconvenient, return it to the store from which you purchased it for a replacement or to have them pair it for you.