15% Restocking Fee? For what?

Finally I had arranged with Christine to return the excess finish work that I was sent with my order. 12 boxes were returned the majority of which are spacers and fillers and there is absolutely no where they could possibly fit into my kitchen. Another example of the content returned is two 96 inch pieces of toe kick. I was sent 4 x 96 inch pieces of toe kick. I have a maximum of 101 inches of toe kick in my kitchen. Why would I ever need up to 384 in. of this item. Here is the straw that has broke the camel’s back. I receive a message from Christine on 7/14 saying she would like to discuss the credit back to my account for the returned pieces and she wanted to let me know that there is a 15% restocking fee on custom order items. Again I am being asked to pay for the incompetence and mistakes of your employees. Are you kidding me ? Who creates the SOP’s within your company?