@charlhenri
Not to pick on you...but did you know this about that particular Panda location? Are these shops in your area or were you doing shops outside of your normal "territory?"
The store # is right next to the address in Sassie. If I had questions, I would have called the location and asked what their store # was. Yes, I agree, the MSC should have been more specific, but if you are unsure, it is your responsibility to verify you are shopping the location they want. It sucks, but it's easy for them to say "you shopped the wrong one." When in doubt, CHECK IT OUT. You cannot assume you are doing the right location.
If you didn't want to call, then you could have purchased a cheap item (maybe a cheese ragoon). They print the store number on the receipt as well.
I know the situation sucks that they didn't make it clear...but you did it assuming you were at the right one.