I handed in my resignation to my old employer on May the 8th. I started my new job on June the 11th. Later in June, I received a letter saying they won't be paying me. I argued it and it's not an argument of if a policy existed before I handed my resignation in. My most recent e-mail from them has a paragraph that sounds like a threat to my new job. It says this:
You work in a regulated sector and your behavior while employed at Censored may return to your detriment as it may damage your ability to continue working in the education sector, you should be careful with how you approach any challenge and be measured in what you do.
To me this seems borderline illegal. I'm looking at a legal battle with the employer anyway. Is this something I can use to their detriment?