1. For parcel RB83010300CN, you are missing a number, there should be 9 number and you have only 8 numbers. Maybe when you wrote the tracking number you miss to include one number.

2. For parcel RS812510113CN. this is the tracking:
Number: RS812510113CN
Package Status: In Transit

Destination Country: Greece
2016-12-08 15:13 CHINA, SEND ITEM ABROAD
2016-12-07 20:55 CHINA, RECEIVE ITEM FROM CUSTOMER

Origin Country: China
2016-12-11 01:36 Guangzhou Terminal, leave the
2016-12-11 01:36 Guangzhou Terminal, left hand navigation
2016-12-11 01:16 Guangzhou Terminal, arrival
2016-12-08 15:10 Exchange Bureau in Guangzhou, have been exported directly
2016-12-08 09:42 Exchange Bureau in Guangzhou, have been exported to open
2016-12-07 23:13 Bulk acceptance packet processing center in Guangzhou, left, the next station "Terminal of Guangzhou"
2016-12-07 23:06 Bulk acceptance packet processing center in Guangzhou, has
2016-12-07 20:55 Guangzhou international mail operation Center has been receiving and sending
2016-12-06 13:33 Electronic information has been received
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Powered by http://www.track-chinapost.com

3. Your parcel is On Route/In transit to your country Greece. May I suggest you look at this for your country:
http://track-chinapost.com/China_Post_Arrival_Time_Stat.php

4. Now what need to happen is Greece Post scan your parcel on arrival or when they have time to do it.

5. Just continue to track your parcel on the Greece Post site for any new movement.

Thanks.

communication after poste in Greece but was told that China is and contact the post in

Ok thanks