Issue as per title.
The store lag combined with muscle memory means that I've now misclicked on three occasions and bought shards for toons that are already at 7 star. The third one was particularly painful as it was about 2.5K crystals for 32 shards of Morgan Elspeth.
I figure there's no chance of getting any refund on this, but if anyone at CG feels like being generous I'd be grateful.
If not: Fix your game CG!