Same problem here: (RB306573098CN,RB160035044CN)

Can anyone help me tracking my items,plz?
These 2 parcels (RB306573098CN,RB160035044CN)are null what does is it mean?
I face a problem with this parcel RB306573288CN i found out that it bot by the customhouse check so the seller send back the same new items with different parcel nb RB151038325CN but till now i can not track it. Can any one help me please. Many thanks in advance