Unfortunately this is not something they can resolve via the forum. If you have submitted a ticket that would be best way to get a response and a resolution. Unfortunately they've been having a huge ticket volume since 4.0 was released.
I wonder if there is some bad happening between the class and planet stories, because I just did Taris on my Torguta Assassin. I got Ashara no problem, and all I did was class story there. (Master Cerik and Darth Gravus have nothing to do with her story, that is straight up planet story). Did you bind the ghost on Taris? Because that is where you should be getting Ashara from, going and meeting her Jedi masters, killing them, binding the ghost in the enclave and taking her with you because she now has nowhere else to go...
