I have not get my Payoneer master card. So I want to remove my existing Payoneer card from my upwork account as soon as possible. As I want to add my new Payoneer card to my upwork account . Please let me know and solve my problem.
Removing Payoneer payment method is bit complicated process, you first need to contact Payoneer and ask them to remove it for you, once they are done, you will need to contact Upwork so they can remove it from their side too.
Payoneer doesn't allow its users to create duplicate accounts and you will need to contact Payoneer Support, so they can associate the new Payoneer account to the one you registered on your Upwork account.