One of my (steam) members had to restart the game for their purchased shards to show up. This doesn't happen on iOS or Android. Perhaps the issue is linked? Wouldn't want people making a second purchase thinking the first didn't work, only to have it show up later... both in game and on their credit card..
What happened to me:
I bought the same pack twice, quite fast after eachother. (This isn't supposed to be possible I heard... didn't know that)
The game gave me all of the items, so everything was fine.
When I spend some items I bought I got a very weird error and was disconnected.
When I restarted the game half of my items were gone and half of the total shards were gone. (as if 1 of the 2 packs got removed)
Reinstalled and rebooted the game, nothing helped. the money was still spend though.
I contacted support and they checked the logs and gave me the missing pack back.