Locked out from incorrect account linking - Steam unlink feature?

Apparently my steam account had already been linked incidentally to a family member's old PoE1 account years ago (the one i'm posting from now) he's helped me change the email & password recently, but I still want to unlink my Steam.

Doesn't really seem fair to pay $30 & not be able to play on my own account I created separately? Don't want to make a whole new Steam just for PoE2 either--he hasn't used this account in years, certainly not for PoE2, he doesn't even want it anymore etc etc

my actual account is: EndoLuseus#8990
thank you -- seems like others have been locked out due to account-linking issues as well, hoping this website gets an integrated unlinking feature eventually! Godspeed

***UPDATE***

I just received an email reply around 30-40 minutes ago alerting me that the Steam account associated with that particular email had been unlinked -- HUGE THANKS to 'Kieran'!!! Going to purchase PoE2 early access finally on my main account now :)

possible tip for those whom haven't received an email back:
MAKE SURE you've been emailing support from the email address *directly* associated with the PoE account you wish to unlink. That may have helped me in my case &/or expedited the experience (and maybe don't forget to provide crucial info like Steam ID# as well, etc) -- GOOD LUCK EXILES