This is why you should have: #1 Read what you were purchasing before hand. (yes I understand the sales people mislead you) But you said it your self, it said the kit does not come with an FMIC. You obviously had doubts, why else did you call several times to confirm with several different people?

#2 One of the first rules of phone coversations when speaking to a business is get the names of the tools you are speaking to. Collect all the details so when Mr. Boss says "who did you speak to?" you can say "I spoke to Chris on the 5th and Joe on the 7th etc etc." Get your shit in order !

#3 ALWAYS Dispute anything purchased through your Visa with Visa directly. Wasn't the item you ordered, or were promised ? No problem ! They will do it for you. It's shitty your out $300 + dollars. Consider it a costly lesson.