how to act?
- the account was frozen 3 weeks ago, the question was answered on the next day, the point is that IP was used compromised (I use the VPN), but after the first answer, the answer ceased
Poloniex says a VPN service might change your IP address in short intervals, which its website is programmed to recognise as malicious. All you can do is contact support and wait.
https://poloniex.freshdesk.com/support/solutions/articles/1000244845-i-keep-getting-logged-out-why-is-this-happening-You will be logged out if your IP address changes mid-session or if you login from another browser/computer. If you are using a VPN service, it is not uncommon for VPN providers to change your IP address in short intervals, causing you to disconnect.
You might also try asking what to do in the poloniex announcement thread.
https://bitcointalk.org/index.php?topic=420836.0