A google search revealed the following, tid bit of info.

Any professional FTer, worth their salt, anticipating an upgrade would know these facts in advance, however the OP was not expected to have brushed up on his different types of cheeses, as he was not expecting an upgrade using an award ticket.

"A big misconception about mold is that it's okay to eat moldy cheese. This is not the case with all cheeses, and consuming the wrong type of mold actually be very hazardous to one's health. For certain cheeses, mold is used to make the cheese, which means that it is safe to eat. These types of cheeses include Roquefort, blue cheese, Camembert, brie and Gorgonzola.

If you see mold on other types of soft cheese (other than those listed above), the entire piece of cheese should be thrown away. Hard cheeses with mold are salvageable if you cut off the moldy area, as well as a one-inch radius around the moldy section. This is to eliminate all of the mold roots that have spread beyond what is visible to the naked eye."

Therefore, a complaint to customer service would definitely be "cheesy"!