I happened to be playing another F2P game, and bought something in their in-game store. Their store had a feature which would be very useful for us to have -- a "return policy".
The bundle that I bought was in a "box", like some of our C-store items. The box was bound, and returnable for full credit until I opened it, or a time limit had elapsed (I think it was something like 2 hours).
I think a system like that is great, and would probably ease the burden on Customer Service. No more "oops, I bought the wrong item".
That is an excellent idea! I am surprised that there is not a system in place already. It would perhaps solve some of the 'greed' issues on the exchange, a ship fleet module should not cost MORE than five million EC for example.