Chime Gen 1 no longer working

We have the Chime Gen 1 and for about two or three months now it just slowly flashes blue but does not play the doorbell. I have tried reset. I have even tried to reinstall it and get this stupid message about it having another owner. Duh! All of this started after we upgraded our modem. I think it is very stupid that there is no easy fix for this. Tried chatting with a tech today and they said troubleshooting requires a phone call. This is awful customer service. All techs should be trained for all issues.