I can't renew my Fortnite Crew subscription after I changed my payment method
If you are unable to re-subscribe to Fortnite Crew due to having changed your payment method, you can troubleshoot this issue by canceling and resubscribing to Fortnite Crew.
You can find the steps on how to cancel your Fortnite Crew subscription here: How can I cancel my Fortnite Crew subscription?
Once you have canceled your subscription, you can re-subscribe using your updated payment method.