Amazon Email That Told Me My Account Was Changed To A Different Email

I am writing because my Amazon shopping account appears to have been hacked. This morning I received an email from Amazon stating that the email address on my account had been changed, even though I never requested or approved any change. Since then, I have been unable to log in to my account. I contacted Amazon customer service, but they kept trying to send a verification email, which I never received, so the process could not be completed and I still do not have access to my account. As a result, I am currently locked out and cannot manage my orders or account information. I request that my access to the account be restored as soon as possible, that the unauthorized email change be reversed, and that all necessary security checks be performed to secure the account against any further unauthorized access.