http://www.track-chinapost.com/track_chinapost.php?code=RI643878551CN shows the last location was in Guangzhou on Sep 28. this means the parcel has left China(none will scan the parcel anymore outside China). http://track-chinapost.com/China_Post_Arrival_Time_Stat.php shows parcel to Bulgaria might take up to 51 days. you need some patient.

Quote from darkmind666david on October 21, 2015, 17:46
RF095926622CN for this track

http://www.track-chinapost.com/track_chinapost.php shows only one result:
Electronic Data Received

This means your seller only applied a tracking number from china post using software, but did not ship anything to you. In other words, the number so far is fake.

Quote from Jouke15 on November 5, 2015, 14:59
Hello, ive got tracking number RH138907225CN, can you please track the status?

Your item left Shanghai for the Netherlands on 27-Oct. I'm not sure of the usual transit time but most of western Europe is about 2-3 weeks.

2015-10-27 16:21 上海, 启运 (Shanghai: departure)
2015-10-27 13:15 上海浦东, 离开交航 (Shanghai Pudong airport: sent to airline)
2015-10-27 13:14 上海浦东, 到达 (Shanghai Pudong airport: arrival)
2015-10-27 04:48 上海互换局, 已出口直封 (Shanghai transit station: export customs cleared)
2015-10-27 02:10 上海互换局, 已出口开拆 (Shanghai transit station: export security scan)
2015-10-24 23:14 广商国际小包, 离开，下一站【广商大宗】 (Guangzhou parcel center: departure)
2015-10-24 18:49 广商国际小包, 已封发 (Guangzhou parcel center: dispatched)
2015-10-24 18:48 广商国际小包, 已收寄 (Guangzhou parcel center: acceptance)

You're welcome!

Your seller delayed shipment by 10 days. The item was only sent on the 24th of October. It left Beijing for the UK on the 25th. Average transit time to the UK is about three weeks, you should get it any day now.