Redeeming old product codes
I've been trying to get my old Sims 2 games onto my Origin so I might be able to upgrade to Ultimate Collection like is says Here and a couple of other places in the help section this week, but all my product codes give me this message:
"We're sorry, this code cannot be redeemed here. Please redeem your code at the following site: http://help.ea.com/."
Eventually, I found https://activate.ea.com/activategame.do, but it says my product key for my base game is already in use (possibly because it was already registered on my EA account, which I already updated to an Origin account, but I don't see any of the games I had already registered with EA). When I tried an expansion pack, is says:
"Select an Electronic Arts Classic Screen Name Persona from the list below to associate your product code to or provide the details for a new one. NOTE: If you are activating a game that requires a base game to play (example: booster pack, expansion pack, stuff pack, etc.), you must select an existing Electronic Arts Classic Screen Name Persona that has already played the base game."
One, I don't know if it's actually asking for my Origin screenname and password to link to, my old EA account, or something new. Two, I was unable to get my base game in first, so there was no list to choose from.
Now what? Little help, please?