No communication at all!!

I ordered samsung filter cartridges in January online with you and it arrived promptly and all, but because of one letter difference (between a c and a q) I ordered the wrong ones. I rep**** to the mails that I got about my order that I would like to exchange the cartridges, but no comms on it at all. I sent a mail to the email address on their website, also to no avail. Now I sit with very expensive useless cartridges and absolutely no way to get this resolved. I hate leaving bad reviews, but this is my last resort!!