this product does not match the description, in fact he was saying that this product is compatible with MFC6920DW, so I chose knowing he is dearer to other products, in fact, the cartridges are accepted when you insert them in their seats, but a pity but at the time I closed the door of their location, the printer stops and rejects (it's really spent the money for nothing). How to be reimbursed without losing anything? Can someone help me