Gnashy

I purchased all of the required map packs for Halo 3 just to play online MM for certain playlists but each time I selected a playlist ( i.e. MLG or SWAT), the MM lobby tells me I do not have the required map packs to play which IN FACT I do. I'm aware that this has been an issue with many people in the past and I tried all the steps to solve the issue like re-downloading the map packs, clearing system cache, pre-loading the maps in customs/forge and I even made sure that I had performed a licesnse transfer. None of those worked and now I'm really upset that I just spent 1600 MSP for content that would probably not work. If anyone knows how to resolve this issue (or if I could get a refund if that's even possible), I would really appreciate it. Thanks!