In as much as you were on a paid tkt, getting back any miles as I suggested is out. What you need to figure is how much CO should send you, if they do it'll probably be a voucher towards a future flight. max i would think you might if Lucky get a $500 voucher which would bring the fare of the flight to a very high Coach price. $1400 each way for a Z is what you paid. I dont know what anyone has received in the past but not having a proper working seat in BF is Major in my book.
I dont suggest speaking to them, since you are in JRS I think faxing them would be a better idea. Make sure to specify what you want in compensation and why you feel that you are owed it.
Let US know what happens.