From my understanding the porshe pack has nothing to do with the VIP pack. The VIP pack is just a way to have the collector's edition cars and maybe the crown by your name....possibly the tracks? I'm not sure, I bought the LCE at launch.
I have same problem. status code: 800700E8. I believe this is only temp problem?! If not there also could be problem with regions. This content will be available only where is Xbox live service available legally.