Inform administration of chess.com... I think.
How to ban Hacker if they get in my game and stole my information and stole money from bank??

Perform a cyber trace, the do a ddos attack and pinpoint his language, then get some wire and a fuse and some gasoline and a bubble and light em up

I bought my diamond on this from the gift money, don't ask me how I got money but I used it to buy diamond. So right after the payment, I got the diamond but when I was playing a game, I lost, then I went to settings to see what can I do which my diamond, but I saw that there was a button "Free Trial". I bought it before but when I saw, It was showing to me that I have not bought any diamond. Now I have to buy again?!? Where is my money?!? I want my diamond back!!!

I bought my diamond on this from the gift money, don't ask me how I got money but I used it to buy diamond. So right after the payment, I got the diamond but when I was playing a game, I lost, then I went to settings to see what can I do which my diamond, but I saw that there was a button "Free Trial". I bought it before but when I saw, It was showing to me that I have not bought any diamond. Now I have to buy again?!? Where is my money?!? I want my diamond back!!!
No one in the forums is going to be able to help you. You'll need to open a ticket with support.
https://support.chess.com/collection/343-contact-us
Generally speaking, if something like that happens, there was a problem with the payment method.
How to ban hackers if they get in my game and steal my information and stole money from my bank??