My windows were great but service before and after...

My windows were great but service before and after sale were unacceptable. When I placed my order they made a mistake on the quote and made me pay a extra $300. Then placing order again they talked me into paying extra to use their screws saying I could not find them locally. (Not true. Found right down street ). They sent sheet sheet metal screws and I needed wood screws. When I wanted to return them they took attitude and said they were not returnable. So I paid a extra $350. Uggggg. I hate being ripped off.