If you sure you did not created a Google Ads account (for example via Google My Business account), then it’s possible your account was hacked.
Open the https://ads.google.com (Sign in to the account you got the email about the payment).Click on Tools and settings menu (wrench icon) then check the Access and Security pages (remove every manager you do not recognize)Change your password immediately after removing unauthorized users!Secure a hacked or compromised Google Account following these steps: https://support.google.com/accounts/answer/6294825?hl=enImmediately report charges you don’t recognize:For unauthorized Google Ads charges check this article: https://support.google.com/google-ads/answer/2472641?hl=enAlso check your Google Play account: https://support.google.com/googleplay/answer/2851610:
Here you can check your password was leaked: https://www.avast.com/hackcheck
I recommend to read all the steps first, and being very careful as you could lock out from your account mistakenly.
A recommend to perform similar steps in all your platform You use (like facebook etc.)
Also check (ask professional service) your computer, tablet and mobile for malware and unwanted software.
Never provide your password in websites your reached via clicking a link in an email (or chat).Never use your password on multiple sites.
Please note, this is a community forum.