It’s possible that the email address for your account is not correct. Try putting in your email address as the account name, and see if it recognizes that as a valid email address.
If not, then you will need to manually edit your user record in the database. That is assuming that you have authorized access to the hosting account, since you have to use a tool like myPHPAdmin to do that. Lots of googles/bings/ducks on how to edit the user table. (But do a backup first, just in case.)