You must cancel your current offer before the deadline, that is before check-in is closed for this flight. You will receive an email confirming the cancellation of your offer. You can only make a new offer with your preferred credit card information. If your offer is successfully accepted, but the upgrade has not been made due to a lack of funds on the card or other issues with your credit card transfer, you will receive an email with a link to provide your new credit card information.
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