i don't believe it was (as they'd require to have some brain which clearly didn't have this out of this world reply.
I love the chat function of the FS app, would be better if they could always indicate their name which they rarely do

Also in case there is a charge after check out not listed on the check out invoice, is it not normal to provide a new or revised invoice ?
In France it's a legal requirement to provide an invoice over XX euros (can't remember the amount but it's not high)
Regardless of the legal requirement, it's part of a basic service / logics to inform someone that you're charging his credit card (and not me to find out by chance checking my CC statement)