Can you help me recover my stolen account

All the equipment and high-value items in my account have disappeared
And my account has also had its password changed. When I logged in, the system prompted me that my password was incorrect. I thought it was a mistake, so I changed my password once before I could log in. He changed my password and did not receive any verification email from my email. I can't believe how he did it
Please help me check the data and restore it. Thank you very much