You don't.
Read Carefully: [url]http://www.bungie.net/en/View/bungie/eula[/url]
You are LICENSING the rights to play Destiny.
Any content that may have been on the Disc at time of purchase is not yours it belongs to Bungie and Activision.
Therefore you were never cheated out of any content as it was not yours.
If this is unacceptable to you there was a 30 day refund policy granted to you in the terms & conditions that you probably didn't read. If it has been more than 30 days you have no one to blame but yourself.
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Edited by Xyrin Arcaiin: 1/16/2015 2:41:26 AMWe own the game. The content may be Bungie's idea but it wad distributed to people as a product for play, now they maintian that product and improve it with hot-fixes and DLC's. Therefore, we own the game. (This probably makes no sense but my point is, we own the game and this post is pointless.)