I highly recommend getting off the ship as early as possible, very early. Hire a driver or taxi and get yourself to the airport. Contact your airline for wheelchairs assistance, that is where it is usually done not through HAL. Your TA should have taken care of this not HAL. Don’t wait, do it yourself. The lines are long at Schiphol. I have used airport assistance for my mother with all of the major carriers and I arrange it on their website. It will help to get you through the lines faster than other passengers but do not expect speed.