Log in at trala.com using the email associated with your account.
On the left sidebar, click on the 'Account and Subscription' icon. Then select Update Payment Method.
This action will bring you to a new window. In this window, navigate to the Payment Method section.
Select + payment method to add your new payment card details.
Look for the three horizontal dots next to your old payment method, and click on them, and select "Delete" to remove the payment method you no longer want to use from your account.
For more information on managing your subscription & billing, click here.