830 no longer pairing with Huawei M20 Pro

Had a problem with the 830 not connecting to my phone so removed it from the connect app. Since this all I get when I try and re pair is that the pairing has failed. I've removed the 830 from Bluetooth settings on the phone, removed from the connect app, nothing.... Reinstalled connect app, still nothing.... Reset the 830, nothing, all pairing faile . Anyone any more ideas how to get the 830 to pair?