Payment Made Without an Account?!

I got an e-mail from Avast saying that I’d converted my trial subscription into a full version for $42.49. However I’ve only been using the free version of the antivirus without even an account connected (I made an account just to post here).
This is what happened when i tried to check to see if i even had an account with Avast. http://prntscr.com/dzvo21
and this was the e-mail I received at kibaduals@gmail.com. http://prntscr.com/dzvu52
Below it states an auto-renewal plan and by this point i’d like to cancel it however there doesn’t seem to be anyway to.

Contact avast https://support.avast.com/support/tickets/new

Avast FAQ https://support.avast.com/

https://www.avast.com/faq.php?article=AVKB24

If that is your email address, it is not smart to post it on a public webboard as spammers will harvest it and abuse it.