I cannot sign in or create an account for the online platform

I created an account on warriorjs.com (at least I think I did??) and the page said I would be receiving a mail to my account with further instructions. i did not receive any mail, and i have checked all folders in my account. i left the process there believing maybe the mail got delayed somehow and will arrive later. i checked after a long time and the mail has still not arrived.

going to the sign up option wont let me use the name i want saying there is already someone with that name. though i was not receiving this error for the same name a while ago on my first try.

going to the login option gives me an incorrect password or email message. clicking on forgot password (which i didnt) gives me another message "There is no user with that username/email"

I am really confused as to what is happening. i am pretty sure i might have done something wrong, and if so, please help me rectify this issue.