Someone hacked my Steam account :(

I don't understand. Do you still have access to account?

"Steam Support has flagged your account as potentially having been used for fraudulent activities. Please contact Steam Support so that we can assist you. We suggest you to move all of your tradable items to a different steam account until we resolve this issue or else they are going to be automatically permanently removed once the ban appears on your steam account."

"On Trade Cooldown Until: Jun 2, 2022 (5:00:00)"

This shit was written by the scammer themself, not Steam support, they will never tell you to "move all of your tradable items to a different steam account" DONT DO ANYTHING WITH YOUR ACCOUNT, DO NOT TRADE OR CONFIRM ANYTHING ON THE STEAM APP

add me, I will try to help

I've never heard of Steam telling you to move all your tradables items to a different account. That's suspicious. They might be trying to get your 2FA code so they can transfer all your items to their account. Don't do anything except try to contact Steam support first.

As User2342 said, these are the scammers contacting you, not steam staff. You can view the official list of steam staff (be sure to check the ID, as the scammers can use the same name). Regardless, staff won't ask things like that.

Report the account that contacted you. Enable 2FA. Log out of all devices and change password if needed, as Ryzhehvost suggested.

I have been targeted numerous times, almost always by Chinese accounts. After a few dozen attempts, they'll leave you alone. So, just be prepared if that happens to you too.

Steam will never contact their users via messages or outside non-official sources. I am really sorry to hear about this. I hope you get your money back. If the hacker bought games, as gift for themselves, it's probably possible to get the money refunded and their account targeted and suspended.

IT IS SCAM!!!
IF IS REAL YOU GET THIS!:
https://i.imgur.com/qhcxFOM.jpg , https://i.imgur.com/FgPWwCr.png
OR
https://i.imgur.com/4YbyywX.png
OR
https://i.imgur.com/ch8y2Ex.png (full ban)
https://i.imgur.com/aM10Tyc.png (trade ban)
https://steamcommunity.com/discussions/moderators
^ LIST of mods and suport team
https://www.reddit.com/r/Steam/wiki/scamtypes#wiki_valve_employee_impersonation
^ READ this slowly
https://steamcommunity.com/id/afarnsworth
^"Real" steam worker (info up, special barge(https://steamcommunity.com/id/afarnsworth/badges/11), special grup (invite only))
https://steamcommunity.com/groups/Valve/members
^real steam workers members!
AND REMEMBER

• There's no such thing as appealing a pending or false report or ban.
• There's no such thing as a pending ban.
• There's no such thing as a pending report.
• There's no such thing as a false or accidental report.
• There's no such thing as item verification or item scanning.
• There's no such thing as a Certificate of Eligibility.
• NEVER share your account credentials, including your sign-in name and authenticator codes.
• A Valve employee or Steam moderator will NEVER add you as a friend to talk to you about ANYTHING pertaining to your account or items.

This is why I never leave large amounts of money on steam.
Other than the authentication with the app they need more ways to prevent stuff like this.
Like a way to disable the marketplace for people who never or rarely use it.

I spoke with the seller guy who also been hacked. The fraudster did it probably for fun or he just failed doesn't matter. He will give a csgo skin worth 80 Euros after 15 days (trade ban, my auth changed...)

I hope everything will be alright. Thanks guys!