You're now complaining after 1500+ days?
No you won't be unbanned
https://psteamcommunity.yuanyoumao.com/discussions/forum/9/882959527688934488/

引用自 Master Ipman Is Back：

I was VAC banned a long time ago, and I’ve been trying to contact support for a long time, but I haven’t received any response. I’ve noticed that many players with VAC bans are still able to play, so why can’t I? This account was hacked at the time, and the VAC ban was applied the very next month. I don’t even know the reason behind the ban as I wasn’t in control of the account when it happened. I understand that unbanning is not an option, but I would like to know if there is any other way for me to use this account to play again. I would really appreciate your guidance on this matter.

See link and info below. At any one point since you received the ban 1578 ago, you could have clicked on the "info" button which will give you the info below. Account security is your responsibility. Bans as old as yours have been checked and rechecked multiple times and will not be removed. If it was incorrect, then it would have been automatically removed already.

Vacban - https://psteamhelp.yuanyoumao.com/en/faqs/view/647C-5CC1-7EA9-3C29

Can I appeal my VAC ban?
No. VAC bans cannot be appealed. If a VAC ban is issued incorrectly it will be automatically removed after investigation, but Steam Support does not manually remove VAC bans applied to accounts for any reason.

I was not using my account when it was VAC banned. Can the ban be removed?
No. Any bans added to an account will remain regardless of who was using the account at the time the infraction occurred. Ultimately, the use and security of your Steam account are your responsibility.

While we understand this can be frustrating, we must maintain a zero tolerance policy for cheating to foster a fair game that all players will enjoy.

Hmm weirdly 1500 days of no posts at all and suddenly you care .... come up with a better story than this BS

引用自 Vox：

You're now complaining after 1500+ days?
No you won't be unbanned
https://psteamcommunity.yuanyoumao.com/discussions/forum/9/882959527688934488/

Probably bought the account

VAC bans are permanent, non-negotiable, and cannot be removed by Steam Support. So nah, ban will be forever.

引用自 Master Ipman Is Back：

I would like to know if there is any other way for me to use this account to play again. I would really appreciate your guidance on this matter.

Just play on unsecured servers with your fellow cheaters.