When I received my two lamps, they each came with similar, but different lampshades.  I sent a note to Wayfair.ca and they responded right away.  I uploaded a few pictures and they went to work making it right for me.  They kept in contact with me and advised what they were doing to correct the issue.  There was no fuss or muss for me other than typing a few e-mails and uploading a few pictures.  I now have two matching lampshades (received very quickly, might I add) and am happy with both my lamps and the customer service I received.  I will definitely buy with Wayfair.ca again.