Oh, I understand how frustrating that is. I had a similar situation where someone sent a fake email as if they had hacked my account and demanded money. I figured out that this was a standard scheme and found a useful article - https://cyberpanel.net/blog/what-you-could-do-anytime-if-someone-is-blackmailing-you-online- that explained how to react. The main thing is not to panic, don't pay anything and change passwords immediately. Now I always enable two-factor authentication on all important accounts. This helps prevent hacking. By the way, it is also useful to regularly check whether your data has leaked online via special sites.