Paid for goods never received

I ordered from Airydress paid the import vat .They actually let me know that was shipped on the 17/12/2018 .Now that I am querying them they let me know that they have dispatched it which is definitely not true. I have asked them to send me the address where it was delivered and who signed. My order number ********** 46268 Buffalo tracking number BUFZA ********** 217TYQ

Ready for collection by Courier 16/12/2018 17:5810