Still not sure if my Amazon account was hacked

Like many of you, I do a fair amount of shopping on Amazon. I’m an Amazon Prime subscriber, the prices are good (not as good as they used to be, but still good), and the shipping is fast and convenient. However, this morning, I awoke to find the following unnerving email from them in my inbox:

I had not requested any sign in verification code, in fact, I was fast asleep at the time. Needless to say, I was a bit concerned. I was still able to login to my account–my password was unchanged. There were no orders placed.

I had a brief exchange with Amazon’s Twitter help team…

@AmazonHelp I received an Amazon verification code via email last night while I was asleep. I didn't request one. Should I be concerned?

— PointsYak (@PointsYak) March 31, 2017

They finally suggested I open a customer service ticket, which I did.  A few hours later, I received this email response from a customer service rep named Deepak:

Hello,

I’m sorry to know about the problem you have with the verification code of your Amazon.com account.

I’d like to inform you that, due to security issue with other websites our account security team upgraded the security and encryptions of all the Amazon.com account. Also, they’ve automatically reset the password of all those accounts in which they’ve found that the strength of the password is not as per the requirement or not updated within a particular span of time. This is the only reason you’ve receive the password reset email in your account. I’m sorry about this misunderstanding.

Rest assured these changes are done for the security of your Amazon.com account because, at Amazon safety and security of your amazon.com account is our top most priority.

In any case, If you want to reset your password, Here’s the direct link through you can reset the password through your end:

http://www.amazon.com/passwordreset

If you have any future query, feel free to contact us. We are glad to help you anytime. Everyone of us here is trying to solve our customer’s problem as quickly as possible, here’s a link to our e-mail form:

http://www.amazon.com/gp/help/contact-us/general-questions.html

Customer’s satisfaction is our priority.

We look forward to seeing you again soon.

I’ve read that email a few times and I’m still not sure what happened. I’ve decided just to change my password to something more secure and let it go.