Prepay your order including delivery ( and tip for delivery) and make sure your charter company will accept the delivery in your stead, and hold it for you securely.

Acknowledge that you will not be there to reconcile the delivery with what you ordered. Don't expect a third party to do that for you, and be extremely grateful ( tip) if they actually do so, and show you their verification.

Sorry, you are going into a foreign country. Dec 26 is as much of a holiday there as Christmas Day in the US. You are one of how many charters across all companies who have chosen Dec 26 as your start date ? All ordering provisions from the same companies?

Do what you can and go with the flow.