The first thing you should do is avoid responding to the blackmailer, as engaging with them might make the situation worse. Document everything, such as emails and messages, to build a case. You’ll also want to report it to the authorities, as they are trained to handle these types of crimes. To get more detailed steps and advice on how to handle cyber extortion, I highly recommend reading this article
https://www.myvipon.com/post/1490584/Cyber-Extortion-How-Get-Help-What-amazon-coupons. It’s packed with useful tips and resources that can guide you through the process of protecting yourself and getting help.