Got hacked

Got hacked by some MF'er. Locked up all my files, and email accounts. They sent me an email saying they got into my account, but it went to junk and I glanced at it and just deleted it. Now I can't even get into my email to see what they want, even though I would not pay anything. I have so many pictures of my granddaughters and other things that I can't get to. Need to see a computer guy I know tomorrow to see what he can do. FFFFFFFFFFFFFF k. Some people just suck.
How do we know this is really you?