After you log into your MalCare account:
Step 1: Go to Account option in the top right-hand corner.
Step 2: From the drop-down menu that appears, select Billing & Invoices.
Step 3: It’ll take you to the Account Setting page where should be able to see an option called Change Card. Select that.
Step 4: In the next, page add details of the new card and Save.
Learn more: How do I change my current billing address?