If you've entered information on a scam site, cut the connection between the attacker and your accounts. Immediately change the password on the legitimate version of that website, and if you reuse that password elsewhere, especially for your email or banking, update those accounts as well. Enable Two-Factor Authentication (2FA) immediately.
If you shared financial details like a credit card number or CVV, use your banking app to freeze the card and contact your bank's fraud department to report the compromise and request a new card.
If you shared highly sensitive data, such as a tax number or home address, place a credit freeze with the major credit bureaus to prevent scammers from opening new accounts in your name. Additionally, run a comprehensive malware scan on your device using a trusted free antivirus tool to ensure no keyloggers or tracking scripts were silently installed while you were on the site.
Finally, keep a close eye on your inbox and statements for the next few weeks, as your information may be sold to other scammers, leading to an uptick in targeted phishing attempts.