This port is closed against you, due to the crimes you have committed. You have no choice but to turn back, unless...

You could try to sneak into port, if you think it is worth the risk. If you get caught, you will no doubt be taken and tried for piracy. If you succeed, though, you will be able to approach the Governor for an amnesty, sell your goods (at a poor price), and visit the tavern.

Sneaking into town will test your skill at Cunning versus the vigilance of the town garrison. Note that, sneaking into a port with the same nationality as yourself is easier than sneaking into a foreign port.