Unless it's in the 10+ thousands, your best bet is to pay and never do business with them again. Anything else will cost you more. Also, make sure you get what

Unless it's in the 10+ thousands, your best bet is to pay and never do business with them again. Anything else will cost you more. Also, make sure you get what you think you should get by using some kind of 3rd party verification. It's impossible to trust someone once they pull this BS.