FTP accounts only have access to chapter 1, to gain access to the remaining chapters you need to subscribe for 30 days.
Edit - see this link on the free trial of kotfe
@proxos666 I Think @StickyYeah means Act 1, Class Story Since he is talking about Zash and Balmorra.
First thing would be go to your Quest log, check if you have an Class Mission still,
if yes read and follow the mission text very carefully, there are some trigger points in there that you need to follow trough.
if not you will have to contact CS, since you are f2p I would try to give them a call, if that doesn't help you can try support@swtor.com
