Scammers scammed and blocked

Good afternoon
I was scammed by scammers. I wanted to sell my phones. And they said that their iCloud does not work with other iPhones. He suggested that I register my iClouds. I registered. Then they changed the password and blocked my phones. I did not know about it. Then they asked me for money. I don't have money. That's why I wanted to sell this phones, Please help me. I'll be more careful next time!!!