http://track-chinapost.com/result_china.php?order_no=RP805542005CN shows the parcel was shipped by your seller From China Post Shanghai office to Canada on Nov 26.

After leaving China, China Post can not scan such airmail parcel anymore. Unfortunately Canada Post only scan China Post ePacket and EMS parcel, BUT DO NOT scan airmail parcel. So you can not know any further status of such register airmail after it left China.

Now is rush season, and your parcel is China Post register airmail which has very very low priority to get sorting and delivery service in Canada Post system. Normally airmail parcel shipped in Nov and Dec from China to Canada can take up to 60 days to get delivered to receiver.

If your buyer protection is expiring, you need open dispute for refund, otherwise keep waiting.

We only know the parcel is outside of China Post system. possible locations are China export customs, airline warehouse in China , Canada customs in Canada or some post sorting center in Canada, or even your nearby post office. You can not know which is the exact parcel current position because Canada Post does not scan this kind of parcel.

I personally believe the parcel now is in Canada . Because many other similar parcel to Asia countries have arrived destination post system. Airline has no reason to hold only Canada parcels there.

The only problem is that the Canada Post and customs give very low priority to process such Register Foreign airmail parcel. So your parcel might still be waiting in some Canada Post or Customs warehouse waiting customs clearance or sorting and routing service.