Sims 2 Ultimate Collection registration [ Edited ]

[MitchWall1]

I bought the sims 2 disc on ebay about a year ago, and when I received it. the case did not included the manual, so I got a code online and it worked to play the game. now I am trying to register the game to get the Ultimate Edition but it says the code I got online had already been registered. I have manuals for some of the DLC I purchased. Any suggestions to help me?

Edit: After calling support codes from DLC work to get the upgrade