Wow, that is horrible
At the very LEAST, a refund from that tour but Seabourn owes you more than that for what happened. Definitely email the president. Don’t give up, keep pushing.
Some have said they assume it is a contract excursion person not Seabourn. Why would you assume that? Seabourn excursion people come off the ship to hang out with the excursions
I have walked from the ship in Barbados, not on disembarkation day which might be different?