I got a 3 year working visa last year in Japan only to work for one hellhole of a company. After much thought I decided to quit and the company made it hard for me, forcing me to pay for my visa amongst other things. I just wanted out. They threatened to cancel my visa but at that time I just didn't care, I just wanted out of that company.
I returned back to my native homeland for a while before ending up yet again in Japan - for a holiday to visit friends. Turns out my visa didn't get cancelled and it's still valid. I look around for jobs and I find a decent job who have employed me. I just need to get a proof of resignation from my old hellhole evil company.
Now the Hellhole evil company are ignoring my emails and phone calls requesting this letter. Is there anything I can do legally to get this resignation proof so I can show my new company?