To use the codes you must login to the SWTOR website account page and select "Code Redemption" in the left hand menu (or use this link). Click the "Enter a Code" button on that page and copy and paste the code in. Some items are sent via the in-game mail system whilst others are applied to your account the next time you login.
If you know of any more then please post them below and I'll update the list. Let me know if any have expired.
Please do not post referral links.
Found out what the issue was it was BitRaider not surprised to be honest.
Anyone else not able to login or download the latest patch as I can't get on says Application Error but Firewall and stuff is fine.