To update your card or billing details, use the billing portal. You'll need the email used at signup and your Order ID if Kartra asks for it.
Open billing portalOnly contact support if the portal does not work or you cannot find your Order ID.
Search your inbox for:
Crate HackersThe DJs VaultInvoiceReceiptOrder IDBilling
Fastest path:Use the same email you used when you joined Crate Hackers.