Hello. I booked a return flight to australia by japan air line from august *th to **th...

Hello. I booked a return flight to australia by japan air line from august *th to **th. I have just received a return flight modification which is postponing for a day and causing the connection to be missed. the confirmation is of the modification is impossible the site of Japan air line giving an error message: Error: We apologize for the inconvenience caused.*The schedule of the flight you have booked has changed. However, reservation details cannot be displayed for the following reasons:* * The reservation includes an upgraded flight* * The connecting flight must be changed due to a change in the flight schedule* * Flight itinerary or seat class has been changed**I can't confirm anything. Will japan air line contact me to give me a new connection? they are unreachable by phone in French.*Thank you for your help