Global Shipping Programme

[authenticautomobilia]

Does anyone know how to contact the Global Shipping Programme? I sold 2 vintage petrol cans to someone in France and I sent them in the same parcel. The Global Shipping Programme advised that the items are restricted but they have only refunded the buyer for one can. I included packaging slips for both purchases in the parcel and I even wrote on both slips to explain that the parcel contains 2 orders. I have posted vintage petrol cans to via the Global Shipping Programme on many occasions previously.