You could get a solicitor involved. There is stories of an aircrewm mate who took a months leave and when his boss checked his in tray found his PVR with a letter from his solicitor. Letter stated that his client the aircrew chum got paid monthly therefore can leave after a months notice. All other contact was to be through the solicitor.
How true I dont know but if it was, it couldnt have been cheap.
Good luck
