BUG in name / domain

My app’s URL: https://santinhodigital.glideapp.io/

I had this URL in my name, I lost it to another user, how was that possible?
I never gave up on this domain!
How to recover it?

Which of your apps was it associated with?

Are you sure it was spelled exactly like that?

this my app’s URL: https://santinhodigital.glideapp.io/

yes, i’m absolutely sure