How to block pop-up notifications?

Everyday I get at least 10 pop-up notifications from www.checkpeople.com and www.instantcheck.com  that I had once subscribed to.  I am no longer subscribed, but I still receive them.  I have them blocked on Google Chrome but it's never worked.  Does AVG have any settings I can make to block these websites?  To be clear, these are NOT email spam, they are pop-up that appear on my screen.  Thank you

Hello, Rich

We will check that for you.
Could you share the screenshot of the pop up message?
You can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.