You ordered on December 30.
Today is January 10 .
There was a holiday on January 1 and weekends on January 3,4 as well as 10 and 11.
Chill.
The jacket, if it was shipped on Friday the 2nd, should arrive if from Europe sometime this week, if from North America sometime next week and if from Asia the jacket will arrive around the 31st and will be counterfeit.
You have up to 45 days to open a Dispute for items that have not arrived or are Not As Described.
http://resolutioncenter.ebay.ca/
Don't wait past Day 42 though. Mark your calendar.
If your Asian seller tells you he will send a replacement, he won't, just open the Dispute.