What proof i have to exactly provide for it to be believable. I got API scammed trough phishing website. i showed the screenshot of the trade were the scam happened. there was the cancelled trade and the trade that happened with the scammer. Also i took a screenshot of the login attempt where apparently the scammer got my API key.
We don't review such reports here. You were supposed to read thru this link prior to submitting any report that notes that. https://forums.steamrep.com/threads/steamrep-investigative-policy.140101/ Any such issues need to be addressed with Valve - that was informed on the link above as well. https://help.steampowered.com/en/