I have received an email from Jetstar saying my flights have been cancelled. It says to go to 'Manage my Booking'. However all I get is a blank page or message saying 'Unavailable'. I have tried live chat and phone, several times, but cannot get through. in fact none of the contact information works. My booking reference is PG5MSF for return flights Singapore/Darwin on 03 September2021 and return on 28 October 2021. Email; [protected]@live.co.uk