So far I've been overcharged over 3 grand for something and underpaid over a grand for something else - I have had nothing back.
Unfortunately, the act of parliament that protects most people from this sort of fiasco appears to be the Employment Rights Act 1996, but all Crown employees are specifically exempt from most of it - including the bit about getting paid - either on time, the right amount, or even at all.
The only place I can see the law actually being broken is that pay statements have to be provided no later than payday - which is not happening.
However, we might be covered under some other regulation regarding money owed. I hear there is a C/T at ISK who has taken JPAC to court about 5 times so far - and won every time. Anyone able to track him down?
Good luck to everyone else affected.