The best rule to get attention is to report to CS many times - improve the quality of ticket every time if you can giving more and more details.
Report the same issue using all of your guild mates, even using same words but different character name ofc.
Try sending private message to JackieKo
https://www.swtor.com/community/member.php?u=24060085
Try making an bug topic on:
https://answers.ea.com/t5/STAR-WARS-The-Old-Republic/ct-p/star-wars-the-old-republic-en
There is an bug with Leuitent Xorem :
Missing Quest Giver on Ord Mantel: Lieutenant Xorem
which i took me 2-3 tickets to get the proper response