LIVE chat, but afaik only in "english" language, but it is easy english!
Link is on top of this page, my post up there!

(You HAVE to go step-by-step there, enter game and click on it (Battlefield 2, on the right side, 2nd page, when you click the little arrow ">" , then when BF2 selected, click on the orange "Weiter" button right bottom side of page), select your platform then in 2nd step ("PC" probably) then again "Weiter" (orange button "continue" ), then in next step as "Issue" ("Thema") choose the answer "Problem with download/installation" (Problem mit ... du wei?t schon) and next step explain in a sentence you wand to add your BF2 serial key code to Origin so you can download the game there, altough you have it on CD/DVD already.
like this:
"Want to add BF2 game to Origin, so I can download it there too now. I have a legit serial key code for my DVD/CD already."
JUST like that, for example.
THEN it MIGHT ask you to login to Origin/EA account (or have to create new account if not yet created)
UNLESS you are logged in already in the website.
Then continue with this step: There IS a chat avalible when it is night or late evening here in Germany, THEN there WILL be a "chat" button displayed on the website.
OR you simply call a support person there, in Germany,
QUOTE from GERMAN support on EA:
"Kontaktdaten des Kundendienstes
F?r Deutschland: 0221 – 37050193
F?r ?sterreich: 0720 - 883349
F?r Schweiz: 0225 - 181005
Danke, dass Sie den Kundendienst von Electronic Arts kontaktiert haben. Unsere Sachbearbeiter stehen Ihnen Montags bis Samstag zwischen 9:00 und 21:00 Uhr telefonisch zur Verf?gung. Sollten Sie Hilfe au?erhalb dieses Zeitrahmens ben?tigen, k?nnen Sie sich an unsere Hilfe Center Website ?ber help.ea.com wenden. Hinweis: Es fallen die Standardgeb?hren an"
Those are the telephone numbers for those countries mentioned there, and it is availible ONLY from monday-saturday from 9 am till 9 pm. ("21 Uhr")
Hotline DOES cost some money!! ("Standardgeb?hren" fallen an, meaning "standard fees apply" I'd translate...)
Good luck/VIEL ERFOLG!!!
