Euro tech was terrible, they threaten me saying be...

Euro tech was terrible, they threaten me saying because I went with a different contractor that this will be put on my credit. Their very over priced and very rude.
The salesman told me he was turning in the contract on Wednesday, I called him on Monday and told him we was going to wait. Then a field manager came to our house trying to get us to buy the windows again, we was like no thanks
That's when he ran out saying we owe them restocking fee, my windows was never measured so what stocking fee!!!