I wish to change my credit card details for future payments of subscriptions .
Hi Robert,
We're glad to help pointing you in the right direction. We do have a specialized team who deals with billing queries.
We'll be able to update the card info while subscribing or renewing.
In this regard, we'd suggest you to initiate a chat with them by using this link.
They'll help you to renew AVG using the desired card.
Thank you for your understanding in advance!