Articles in this section How to Find the Email You Used with Apple Pay (iPhone) Apple Pay: Finding the Correct Last 4 Digits for Your Purchase Is my plan subscription-based? What happens at the end of my billing cycle? How can I update my payment method? I didn't authorize a subscription or recurring charge. How can I update my payment method? To update your credit card information: Log into your BlossomUp account. From your profile avatar, go into Payment Details from the left menu. Select Update to change your payment details.