Modlily Took My Money and Ran! Never received the product and there has been no response when I asked for a refund. China Internet, Facebook

I saw an ad on Facebook when I was checking my feed, with some really unusually, cute, fashionable clothes and good Christmas prices on December 5, 2016. Since it was a company, I had not done business with before, I placed an order for 1 sweater and the ad stated that it should be shipped and received within 7-10 business days.  All orders have to be paid through PayPal, which I did and the payment went through my bank almost immediately. On December 16th, I checked the status and it showed it was in processing but still had not been shipped, so I contacted Modlily and asked when I could expect the order. They gave me the ticket #T6922735378 and a response on December 17 stating to please give them another 1-3 days before they could ship it since it was a particularly hot item. I sent them a response on December 18th, and told them I would like a refund, since it would not be here in time for Christmas and it was purchased as a present. On December 19th, they refused the refund and stated they hope it would be processed and I could receive it in time. On December 21st, I checked the status and nothing had changed, so I once again asked for a refund and received no response from them at all. On December 28th, I checked the status once again and the staus still has not changed, it shows still in process. I asked for the third time, for a refund, and still have not received any response. I wanted to contact PayPal, but they do not show any transactions for me in the past 3 months?