Worse than that, during Christmas they claimed they delivered my package, but they really didn't. I had to get the seller to initiate an investigation, the conclusion of which was that it had actually been returned to the sender for no good reason and without apology. I get it that Christmas is busy, and if it had merely been late I'd have gotten over it. But they treated me really shabbily.
Incidentally, so did the seller, which took three days to respond to each of my inquiries, had no phone number, ignored my requests, etc. Pretty sad that from a company called 6dollarshirts you don't even get what you pay for!