I have a mobile pass that I think I activated (not sure how as I did not intend to) but now have a new passport number.

Contacted customer service via website and received automated reply but not contacted yet.

Have reservations for Eurostar and trains in France for outward and return journeys.

Possibilites:

Wait for customer service but due to travel next Saturday (3 days to sort out)?

Deactivate (how?) apply for a refund and order a new pass but will I be able to rebook tickets to match the reservations?

Take old and new passports with me?

Other option I have not thought of?

thanks 

chris