Nothing I've read about it.
There have been reports about the plant repacking parcels, especially from specialty sellers whose careful work has been completely undone by the plant workers, leading to extensive damage.
You should not be talking to the seller about this, however.
Once the parcel is accepted by GSP/PitneyBowes, they take full responsibility for the secure arrival of the item.
Open a Item Not As Described Dispute through the Resolution Centre at the bottom of this page.
In the description, note that the parcel was sent through the Global Shipping Program.
This will speed up your refund. That refund would include the import fees you paid.
I suspect that there might be an in depth investigation of the missing phone, since it could be a cheating seller, damage in the mailstream, or theft at the plant. But that does not concern you.
Let your seller's feedback - given and received - guide you about buying another phone from him once you get your refund.
