I have the exact same issue on my Bounty Hunter. I've had a ticket in for 4 days with no response as of yet. Unable to abandon either quest and resetting does nothing. I even tried going in grouped with another BH, no help. I went ahead and moved on to the next planet however at level 24 I see no point in continuing on this character if this issue is never going to be resolved.
I figured this was caused by something dumb I had done myself, I guess it's good to know others have the same issue.. although it sucks for all of us.
Character: Fluke
Server: Shadow Town