I am owner. Can not reinstall device

I am the original owner and user of my Ring. After getting a new router and putting in the password, nothing would connect on the Ring. Not knowing what a headache it has been, I decided to forget device in hopes to reinstall on the app. I’ve tried to add a “new device” on the app. Now it says it’s register to another user but my app shows no devices. 1. I’ve deleted the app from my phone and reinstalled 3 times. 2. I’ve restarted my phone 3 times. 3. I’ve pressed and held the orange reset button at least a dozen times.I feel defeated and about to buy a different video doorbell system unless someone has an easy resolve. Any ideas???