We had great difficulty in trying to change our Ferry booking on line after receiving an email from Brittany Ferries cancelling our Portsmouth - Caen crossing. The system said that a change can only be done by telephoning Brittany Ferries call centre.
This we did but had to wait on hold for 35minutes.
Once we finally got to speak to the Call Centre the person was very helpful and apologetic that we had to change our booking twice due to service cancellations and for the very long wait in answering calls.
Full marks for the call Centre staff, zero marks for the system efficiency.