I know it was stupid but i really need the pack

Hey Xtr_Reverse​,

Sorry to hear you weren't able to choose the actual reward you had intended to grab here. 

I'm afraid we are not able to reverse or exchange in-game rewards once they're received, so unfortunately swapping that out won't be possible. We can certainly pass along feedback that it would have been nice to still have the option once the pass ends in those situations, but this isn't anything we could retroactively change sadly.