Pleas provide a valid email

So i loged in with my steam account to buy the game but i guess i already had an account on this website made some time erlear and to get a key i guess i have to ad legitimate email to my steam gamesplanet acount not one provided by gameplanet by logging in with my steam account so now when i am trying to create a valid email for my steam gamesplanet acount i cant because its says the email is already taken from my old gamespot acount. Is there a way out of this can i just merge both acounts or something. Its funny i had to validate the purches with the my gamesplanet email or my steam email but i guess i cant get a key with a valid steam gamesplanet acaunt email.
Maybe someone can send me a key to my steam email by which i had to validate the purches.