You will need to contact Payoneer first so that they can disassociate the existing Payoneer account on Upwork. You will receive a confirmation email when it has been done. Please get back to us after receiving the confirmation email from Payoneer so that we can assist you further on our end.
Regarding adding a new payment method, please log into your account and follow the steps below:
Please let us know if you need further assistance. Thank you.