Changing devices

I am trying to change some devices on my multi purchase account, but I have just about checked everywhere in the settings , f a q. all that is happening is I am going round in the same circle. I bought avg via ebay and no subscriptions are showing and payments are also not showing.

Hello David,

We'll surely help you out.
As we're uncertain about your issue with AVG. Would you be so kind to elaborate on your issue? 
To locate your order we have sent you an email to your registered email address. Since It isn't recommended to share account/order, personal info over this public post.
Please check for the email and revert back to us.