Aww Tonya I'm sorry about this crummy experience

If it were me, I would wait until you got the results back from the test. Then, while I was at a consult visit regarding Piper's results, I would make the vet look me in the eye and have a face to face conversation with him. I think if you are there, paying for the time to talk to him anyway, he would have a hard time ignoring you and/or "pretending" to listen. BUT.. I would ONLY do this after Piper has been treated and given a diagnosis. It sounds like this vet may be spiteful (ie the "mutilation" comment) and possibly lie to you to make you "shut up." Then, based on THAT conversation, I would write a letter. I would also have a face to face conversation with the receptionist that didn't double check with the vet before telling you it would be ok to drive all that way. If they have your file, they obviously know your address.. for her to say "sure, come on down" and NOT consult the Dr is just plain carelessness on her part. So, because of that, she is in part responsible for your experience too. And, like I said, I would wait until those face to face conversations until I wrote a letter. If you aren't satisfied with the outcomes, write the letter, and CC it to the board of veterinarians (or whatever it is called) because they should be aware of how you were treated.