So there were approximately 2 questions in the original post above. The one you addressed is not the real subject matter of the post. Please adjust your response after review.
As a tip, one of the videos from a source I observed the other day mentioned something to the effect of "FBA not going to let you send in but just a small quantity to begin with."
Also additionally, in reality with my mainstream career currently I work for a sizable company and have dealt with a lot of customers/businesses and your response method there is certainly not one that I would advise wording as such as it is.
I hope you can understand, verified or not.
Thanks