Seafood To Go

I have been coming here for years but today was my last time! I placed an order for pickup: a fried whiting sandwich, broccoli and potatoes. I specifically said no butter, he replied, so no seasoning? I said it again, absolutely no butter and he said okay, no seasoning.
I pick up the food, and it is flounder and the broccoli and potatoes have butter AND seasoning on it. When it was being rang in, even the note said no seasoning.
I called as soon as I left and explained it. To my disarray, the man argues with me that is whiting. I said whiting and flounder filets are not even shaped the same, let alone do they taste the same. And he says to me oh you wanted no seasoning? I said well who took my order?! Because it clearly said on the note no seasoning. Not once did i get an apology and when i asked to speak with the owner, he hung up on me!