Warehouse Deals, Inc Amazon Warehouse Deals sent wrong item, with no return option Internet

I ordered a hatch cover for my toy hauler.  It needed to be the specific size, brand, and style listed in the add to fit.  The brand I ordered from Warehouse Deals was Ventline.  The product I received was Heng brand.  It was 1/2 inch too small to cover my roof vent and the hinge was the wrong design.  There was no invoice in the box, nor any return information.  I contacted Amazon and was told this was not an Amazon product so I would need to contact the seller.  I had no contact infor for Warehouse Deals.   I am currently stuck with a product that I cannot use.  Ironically, Amazon has contacted me three times to answer potential customers questions about this product.  I've told them each time that I received the wrong product, but no followup has been done.