If you are an Admin, you can update your billing info at any time in Endear.
1. Visit the the Billing page in Settings.
2. At the top of the page in the Your Plan section, you'll see an option to Update.
3. If you're using Shopify as your payment provider, you'll to re-authorize your subscription. If your subscription is run through Stripe, you'll be able to add new credit card details.