I see you mentioned VAC four times in your post, sadly I must inform you that you CLEARLY have a GAME BAN (check your profile, it will say game ban in red letters)

https://psteamhelp.yuanyoumao.com/en/faqs/view/46DB-4CEC-F7E9-49E5
Game bans are for many reasons, and you broke one of their rules.
we don't know which one and Valve will not tell you what it was.

Why Valve will not tell me what it was?

引用自 Akiel：

Why Valve will not tell me what it was?

No idea, I don't work for them.
what kinda message do you get if you try to start an online game? tell me the EXACT message.

"you are in cooldown and cannot participate"
It's 1st time have this . and i dont know what to do

Weird that it would mention cooldown, I guess the cooldown turned into a gameban?

i dont know

Well the fact is that there's many reasons to get a game ban, maybe you just cursed at a cheater one time too many.

yea

i hope they remove the cooldown (VAC ban)

引用自 Akiel：

i hope they remove the cooldown (VAC ban)

Pay attention. Cooldown is neither a game or VAC ban.

So, maybe I don't have VAC on my account so this ban will be removed by itself?

1 game ban on record | Info
1 day(s) since last ban

引用自 Akiel：

So, maybe I don't have VAC on my account so this ban will be removed by itself?

引用自 Akiel：

1 game ban on record | Info
1 day(s) since last ban

No, not at all...

The account has a GAME ban

https://psteamcommunity.yuanyoumao.com/discussions/forum/9/620712364027233611/

Game bans have nothing to do with VAC or this forum

Users are responsible for the security of the account and all that happens on it

thank you

1 game ban on record | Info
1 day(s) since last ban

go to your profile and click on the info button, it will give you all the info. Also seeing its for CS2, means its permanent