Help with Segway E3 pro

I bought my son a Segway kids C2 scooter. Worked great, paired right up to the Segway app on my iPhone.

Then we bought a E3 Pro scooter.

We could not add it to the app. It Would not see the new e3 pro at all via blue tooth. No matter what we did.

Tried for hours.

Then I connected the old c2 scooter via Bluetooth and for some reason it now could see the new E3 scooter no problem. Connected. Got it all set up. Perfect. Got the find my app on my iPhone setup too.

Today. We sold my son’s old c2 scooter. And had to unbind it from my app. Well since I unbound it. Now my iPhone will not see it the E3 pro on Bluetooth. Says not found. Tried for hours.

But oddly the find my app still sees it and works.

I have installed and uninstalled the app. I have tried several phones. None of them see the E3 pro via Bluetooth. The Bluetooth indicator in the E3 constantly blinks until it times out.

Help?