Glad to see that they refunded you!
But OMG they dared to say:
"The opportunity to retrieve wrong items purchased at the Pearl Shop is limited to 1 time per month for each account, so please be careful when you make purchases next time."
They were wrong and they dare to insinuate that you might "make wrong purchase again"! Big LOL
Well, at least in that case, as you showed your fangs, they finally complied, after telling you "no" when you asked nicely.
It seems they only know the strong way... that's kinda sad...
In you case, case closed and happily ended!