I'm stuck.

I think you should try keeping tabs on the person you traded with. It's really suspicious how you get hacked right after the trade. Other than that, I would suggest just taking a break until your dad gets back so you can reformat.

I know thats my best possible solution, as for the guy, it's hard to think it was him, only because he's still trying to buy a smiling mask from someone.

-snip-

Nevermind the last part, my dad changed the ISP like 3 days after he did it as a joke.