Which crime did I perpetrate? Which alliance did I form? I'm afraid that winds from Treachers' Bay are whispering you about things that are not real. If I could offer a gratuitous advice to a reputable Assembly don't listen to them. You are only stirring waters of friendship with words like "guilt".
My merchants wronged no-one. I approve usage of slavery as a form of punishment when no better punishment can be applied. But it's creditor right to exchange his debtor for any amount of money he wishes. The ban on sale will hurt the debtor, because he would be waiting longer for the return of his money. You are restraining the trade and freedom of your people, the very lifeblood of Lanun and if you would continue, your nation will become only an empty shell of its former self.
And for the slaves repaying their debt to the society, they shouldn't be on sale at the first place. Your rash reaction implies bad custody or bad intention. While I hope that this is only an temporary misunderstanding, I am afraid that Kuriotate merchants aren't willing to trade in such unstable and unjust market scorning the idea of free trade.
Cardith Lorda, Emperor of Kuriotates