As stated in our Terms and Conditions (paragraph 9.1):
If you choose not to pay the import duties and taxes upon the arrival of your package, The Oblist cannot be held responsible, and the package will either:
Be held until payment is made by you to proceed with the delivery, or
Be returned to the sender.
In the event that the package has already been returned to the sender due to non-payment of duties and taxes:
You may choose to have the package resent by paying the shipping costs again (or the original shipping cost if you had benefited from free shipping), or
We will refund the amount of the product, minus the actual shipping costs incurred.
If we do not receive a response from you within 15 days of the package being returned to the sender, the product will no longer be refundable, including shipping costs.