Why not just give him his money back and stop trolling him? What do you mean by

haejin, you're lucky I'm keeping MY composure after your attempts to try to play me like some fool and wasting my time.

Guessing here that had you just assured him at the start you would return the money, then began sending it with no trolling that he would not be fighting to retain HIS composure.

As for the bot you call out of name, you could simply stop using it if it is such an annoyance.

Your actions are reminding me of a jilted lover who will not allow reason to fuck up their argument and anger. I am praying for you that this demon of envy and anger will be shook free of you and you return to the honorable man I know is inside of you. The man Haejin saw when he helped you with medical bills and gift for the birth of your child. He gets a lot of bad things written about him, things that fly in the face of such kindness he showed you. They say no good deed goes unpunished, and I am sure what you have called silly vendetta acid is him feeling the validity of that saying as you taunt him and hold his money.

Please do what is right and give him his property back. Make today the day that you make a fresh start and make amends to this rift. He won't go away from the vendetta if you don't. Who would?