Repeated spam Google messages

Hello Lydia,

We're happy to help.
We have a specialized team to deal with mobile queries.
To reach them, please visit this https://support.avg.com/support_sales? link and select "Technical Support" tab.
For "are you currently using any paid/trial AVG products?" question, click on "Yes".
Please select operating system as "android" and fill in other requested details.
Finally, click on "request answer via email" which will submit a ticket to our mobile team.
Please keep checking your emails regularly to know the status.
Thank you.

How do I block repeated Google messages from coming through to my phone, being sent from two specific addresses, I am getting20-30 of these notificationsa day trying to get me to click and download anti virusware or telling me to stop sending spam.-even though I have repeatedly used AVG and scanned for threats.
the two addresses are:
  go.studiolegaladerrico.com
and
goodtoknowthis.com

Hello Lydia,

We're happy to help.
We have a specialized team to deal with mobile queries.
To reach them, please visit this https://support.avg.com/support_sales? link and select "Technical Support" tab.
For "are you currently using any paid/trial AVG products?" question, click on "Yes".
Please select operating system as "android" and fill in other requested details.
Finally, click on "request answer via email" which will submit a ticket to our mobile team.
Please keep checking your emails regularly to know the status.
Thank you.