Based on it telling you that it sent a note to your email account, I can assure
you that:
- Yes, your Google Voice telephone number is active and still assigned to a Google account.
- No, it's not the account you think it is.
That tool is looking directly at the Google account that is assigned to your Google Voice telephone number. It has no way to make a mistake. The fact that it found your number absolutely, positively, without any doubt, means that it is assigned to a particular email address/userid, and if you don't see the number, then you are logged into the wrong account.
There is nothing else that can be done to recover your number, if you can't find the account. You would need to sign up for a new Google Voice phone number.
Obihai can't fix this. It has nothing whatsoever to do with them.
Using a laptop or desktop computer's web browser, not a smartphone or tablet, log into your Google Voice account, using the user ID you believe to be correct. Go to this web page.
https://www.google.com/voice#phonesLook at the left side of the page. If it says the exact two words, "Your number", then that's your Google Voice number, and you're logged into the correct account. If it says "Access number" or "Get a Voice number", then you are logged into the wrong account.
If it doesn't say "Your number", and you want to get another GV phone number, then click the "Get a Voice number" link.