After I finished all the objectives and eliminated all the targets in mission 3 the boatman, his boat and the princes are all gone and one is left forever stranded on mission 3 unable to ever move to any next missions, what a waste of time this game has been.

One thread is enough: http://www.gamesas.com/topic/1506827-sos-the-boat-has-vanished-so-i-cant-finish-mission-3/

Spamming topics like this can get you warnings.