Bought twice by mistake

Mário, Have a look @ this AVG article (http://avgclick.me/AVGRefundPolicy).
AVG Guru

I've purchased a AVG ultimate license from you with the black friday promotion. However, after paying, the webpage reloaded again to the payment page asking for my credit card data. I thought the payment hadn't been done and so I payed again. Later, I found out that I had inadvertently purchased two licenses when I only wanted one.
I still haven't activated neither of the licenses I purchased. What can I do to return one of them and be refunded?
Thank you.

Mário, Have a look @ this AVG article (http://avgclick.me/AVGRefundPolicy).
AVG Guru