Doorbell won't reset or shut down

I have a E340 doorbell (T8214) that won’t connect anymore. I removed the device from the app when I noticed it wasn’t recording anything and that I couldn’t get a live feed. Now it won’t even reset (holding sync for 10 seconds), and also won’t shut down (5 quick presses of sync button). It’s just blinking a pattern of 2 quick blue lights and then a short pause, following by 2 more quick blue lights, then a long pause of about 1-2 minutes. The chatbot pretty much said I was SOL because its past the warranty period. Anyone have this issue?

Make sure that the six battery contacts on the rear of the doorbell spring in and out freely.

Also, try tapping the sync button quickly 15 to 20 times.