CAR PARTS

I had a bad customer service at Goldwagen Mayfair, I bought a water pipe for my BWM two days ago today when I take it back because it had a factory faulty they told me that they cant change it on their side it must go back to the supply I must just buy another one or wait for 14 days for an exchange from the supply. I ask for my money back they told me that they can't refund me is not in they company's policy.