UT502011954CN was sent to xiamen airline on Oct 29.

Sent to airline does not mean you will get the parcel very soon. this kind of parcel starting with U is china post ordinary parcel. This is a slow and cheap service for low value item. airline gives very low priority to such parcel for shipping space. Normally you need wait 2 to 4 weeks to catch flight to UK. And after arriving UK, Royal Mail also gives very low priority to process it. You need wait another 2 to 4 weeks to get it sorted and delivered in UK.

Right now you can not see any update because China Post and Royal Mail do not scan it anymore after sent it to airline. Just be patient and wait.

If your buyer protection is expiring, open dispute for refund. Otherwise keep waiting.