I was convinced someone was trying to perpetrate fraud against me using my gmail address w/o the dots. I just didn't understand how. I continuously got (and s

I was convinced someone was trying to perpetrate fraud against me using my gmail address w/o the dots. I just didn't understand how. I continuously got (and still get) emails from Amazon about app purchases (all free) because someone has created an account using my gmail address minus the dots. I have called Amazon 3 times and each time they have either removed my address from the other person's account, or deactivated the account (or so they said). And then I finally got an email from someone, the alleged fraudster? Asking me to stop using their email address......