you are being scammed

引用自 UZI1312：

Hi someone from china contacted me and told me I may be getting banned

Someone from china contacted me and told me that i bought one item from him and never paid.I never did that and also told me that he reported me and gave me an steam account to contact from steam community.. I think i am getting scammed and i need to know how does steam ban people

"Scam: I Have Been Reported and Will Be Banned" faq...

https://steamhelp.yuanyoumao.com/en/faqs/view/3195-9FFB-BA06-F25B

"Steam Scam FAQ"

https://steamhelp.yuanyoumao.com/en/faqs/view/70E6-991B-233B-A37B

Steam bans people after legitimate reports and through their message system.

Never through random strangers accusing you of anything and making you seek out random accounts pretending to be Steam moderators/admins etc.
Its always going to be a scam of some sort.

If you would like to further experiment on how Steam bans people, you can report their account for attempting to steal from you and observe how slow real Steam moderation is in doing anything on legitimate reports.

Anything that does not come to you by Steam notifications system with a bell on it is scam, plain and simple.

引用自 UZI1312：

I think i am getting scammed and i need to know how does steam ban people

Valve can see everything your account does. A report can say anything, Valve will only act on reports where your account has done the thing claimed. But, for context you and your friends could report me all day every day for a thousand different things. Nothing would happen to me since I've never interacted with you or your friends and I haven't done the things claimed in your bogus tickets.

In this case, there is no report. It's just a scare tactic. Scams will often use fear to get you to act/react. Legitimate interactions typically don't need to do that.