I can't figure out my main account username

So when I sign in with my e-mail (in riot games) it takes me to my main VALORANT account. But when I am trying to create myself a password and my game name doesn't work. I go to riot support and click on ''Forgotten Username?" and type my same e-mail out and it changes password to some account that I created like a year ago.
Please help me

My nickname: JoeFather#YoDad