Linking with steam account problem

Hello. I have purchased a steam key of poe 2 early access and tried to log in but instead of linking my existed account, I typed a new name in the box. That has probably created a new steam account and now I m getting the message that I need to purchase a key in order to play. I cant access the page from where I could link my account to Steam. Is there any workaround for this problem?
Thank you in Advance