But am still told there are no account on this email when I try to log in / change password on my PC. I
have now been baffled for several hour long attempts several times.
You don't have to use email to log in. You can just enter your username.
But if you are trying to use the password reset option and that's saying the email doesn't exist, and you're certain your email matches what you entered on the app, then you should use the Help option in the website menu to contact Support and explain.
But am still told there are no account on this email when I try to log in / change password on my PC. I
have now been baffled for several hour long attempts several times.