Shadwell,
Interested to read your note. Am in a similar situation, but concerning overpayment of MQ charges (briefly, moved out in Nov 05, system carried on removing charges from pay despite regular requests to stop) all efforts via HR staff to effect a refund (a couple of K involved)fruitless. Variety of excuses offered, interspersed with 'it'll be credited to your account this month.....next month.....etc' but JPA being cited as the main delaying factor. Have now run out of patience big time and if it isn't in the bank account by the eom, intend to follow the Small Claims Court route shortly thereafter.
I'm appalled at the degradation to personnel support that this godforsaken system has inflicted. The stress it is causing HR customers and staff alike is unbelievable - the anger, disappointment and frustration voiced on this forum only shows a part of what's actually going on out there.