I am new to Shopify and I use it with Oberlo to find products on Aliexpress.
For a product I want to sell, the Aliexpress supplier offers to ship from China OR the USA.
On my product page, a customer located in country X can choose via a drop-down list if he/she wants to get the product from China, or the USA. The problem is, for this product, the USA doesn't deliver to country X, but China does.
However, nothing prevents the customer from choosing to buy from the USA, instead of China.
And after the customer paid I cannot even edit the order myself to select the right supplier (China in this example).
When I try to order via Oberlo, Aliexpress says: "This product can't be shipped to the selected region."
1. How can I prevent a customer to buy from a country that doesn't deliver to him/her?
I didn't know in advance that USA couldn't deliver country X.
2. How can I edit an existing unfulfilled customer order and change the supply country in case the order cannot be fulfilled?