Unable to access cars of "Formula Drift Car Pack"

I wondered how I can access the “Formula Drift Car Pack” cars. Playing on Windows 10 and installed the DLC. When I’m looking at it in the marketplace, it says “purchased”, but they are neither in my garage nor are they in the shop. Am I missing something here? Already tried to reinstall it, but that did not work.

You need to hit start (or escape) and go to the DLC button. Once in the Drift Car Pack you have to redeem each car individually from there.