First contact the carrier or the body managing the terminal providing assistance
If your rights have not been respected in connection with a bus or coach journey, make a complaint either to the carrier or the body managing the designated terminal that provided assistance. Submit your complaint to the party responsible.
If your complaint concerns assistance at the bus or coach terminal, contact the designated terminal. If the problem concerns an event on board the vehicle during the journey, contact the carrier.
You must make your complaint within three months.