@ Cher, sending hugs your way. So sorry to hear you lost your ADR. To be honest with you, I would not take them at their word that it takes 3 years for a full hearing unless you have independent confirmation from another source it is the case.
I don't know if you have thought about this yet, but considering the issue is that you didn't travel abroad while injured, etc and you have medical proof and reasons why, I really believe you should consider writing a letter to your MP and the minister of immigration about your experience with this ADR. Discuss it with your lawyer and see what she says. I know most people fear 'retribution', etc but that is exactly what they hope you will be afraid of and seriously, you have nothing to lose at this point.
Also, was the ADR just with the lady and minister's counsel? Is there a way to proceed with full hearing, and still re-apply? Disgusted!!!