NO CONTACT AFTER PURCHASE

I bought something on Groupon, and paid for it via a bank deposit. The instructions clearly states not to send proof of payment anywhere, and to only quote the reference number, which I did. After a few days I went on my account to check the progress of my purchase, and there was no sign on my account that I even purchased it. All my previous purchases were still there, accept the latest one. There was one I purchased which expired , so if this was the case, why didn't this one also show?<br> <br> I then looked for a phone number to call them, and there is nothing on their website, only an email address. I sent an email 5 days ago with read receipt and guess what, it still hasn't been read.<br> <br> So what now? GROUPON IS THE WORST! Never again. I want my money back please.