I called first. Didn't relish sitting there waiting for an email reply that could take a week or more and lose the seats in the meantime anyway. At this point, might be best to cancel and rebook itinerary to remove the currency issue, but there is a chance we'll lose the seats.I'd be worried too.
Have you emailed as per @Captain Halliday post a few above?
That is your best chance of getting it sorted....they have helped me previously, and know what they're doing...
*Does anyone know what's going on with recalculating taxes and currency?