When you upgrade your subscription, you’re changing from – for example – a three month subscription to an annual subscription. Or a one month subscription to a three month subscription.
1) Stop the auto renewal on your current subscription. The walk though for stopping you auto renewal is
here.
2) Sign up for a one year or a three month subscription on the same account you have your current subscription. We have a walk though for purchasing a D&D Insider subscription
here.
3) Once you have signed up for the second subscription you will recieve an email in 2-3 business days confirming your refund for the overlapping time has been processed.