CC issuers accept collect calls from overseas (to report losing one--or for other issues), but the 800 number probably won't work. On the reverse of any CC I have is their NON-toll free number).
So Xeroxing BOTH the front and back of any CCs you are taking with you could come in handy. [Making an extra copy or two--keeping these in your carry-on stuff and elsewhere, should be helpful in case of an emergency.]