First thing to do would be to add firewall and antivirus exceptions for SWTOR.exe and Launcher.exe. Also opening the required ports on the router can help.
Please make sure that any traffic management software is disabled and if you are using a wireless connection, please try a wired connection.
Please come back to us if the issue remains.
its def not my end matey, downloaded 30gb through steam in that time all at roughly 12mb/s (on 100mb connection)