To replace the payment method and add a new one:
Head to Settings > Billing > and select 'bin' icon to remove the existing payment method.
Settings.
Head to the Billing tab to remove card.
It's not possible to delete the only payment method on your account whilst you have an active subscription. Please first add another method, then delete the first.
Select the 'pencil' icon to update the billing address.
Thanks
FITR