I have the game but the site and the app say i need to buy it again
Sounds like you didn't link it to your itch.io account! Find your original purchase email with the link, and make sure to claim it to your account.
It should say something about claiming it on this yellow bar if you're logged in.
I couldn't find it do you think you could send me another copy of the game please.
Send me an email and we can look into it! Erik (at) Doborog.com