You should not book with Hyundai. As per schedule from Hapag Lloyd there’s a departure with Hyundai Ambition from Singapore on 06.08.13.
If our information is still correct, the feeder from Laem Chabang goes every Wednesday. So it must be possible to catch this vessel.
If there’s something we misunderstood, or if Hapag didn’t accept bookings for this departure, please let us know.