AVG ultimate 2017 problem adding Android phone to Zen network

I have just purchased AVG Ultimate to cover my PC and laptop plus several Android products.  I have successfully added the laptop and all android products except a Samsung Galaxy S3 Phone.  Every time I open the invitation email on that phone and click the link, it takes me to the free trial version of AVG for android in Google Playstore and I'm unable to find the Zen network section that allows me to input the code to add the phone to the network.

Any help with this would be gratefully received.

Hello Gaynor,
Sorry to hear that you are unable to activate AVG in android device. In this case, we request you to contact our AVG mobile support team as this community deals with the technical queries regarding AVG Windows products and AVG Android support is provided through email only. Please click on the following link ( http://avgclick.me/AVGtechnical ) and fill out your details, select as Android then the name of AVG Program that you have installed in your mobile, in description please explain your issue and finally click on Email option.
The AVG mobile support team will reply back to you via email with a resolution.
Thank you.