depends what they wrote, and it'll be... another forces pay problem in the press.
I think he just needs to get to PSF and get someone there to sort it out. If he hasnt been paid, then PSF will arrange for this until the JPA problem is resolved.
As hard as it can be sometimes, getting frantic and angry and being calm and listening to what they've got to say, also asking any questions on anything you dont understand and a full explanation of the action they will take, helps. Easier said than done, but you have to bear in mind you want them to help you, going in with all guns blazing, wont get you anywhere, and after all it wont be the poor clk on the recieving ends fault.