AMAS has been great for me, but then I always had it as a benefit, never had to pay out of my pocket. I started using them in 2004 and have used them on/off ever since then. I had to stop flying several times over medical issues and they were a great help getting me back online. My Doc out there has a weekly phone conference with some high ranking FAA Medical types and gets a lot of stuff done.
You might need a lawyer to get your $900 back thou.....