Hi there Benjamin, my name is Gerardo, and I'm an Xbox player. I'll be happy to assist you with any questions or concerns you may have.
Steam has its own dedicated support team for issues with its platform like the one you're experiencing. You can contact them through the following link:
https://help.steampowered.com/
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
I appreciate your understanding and I wish you good luck!
Kind regards,
Gerardo.