Puerto Rico is a USA territory. Customers from PR may forget this, or see "PR" in the country dropdown and choose it. The store, which is based on a UK organization does not recognize the designation, or will give them international rates when they could instead ship domestically.
When Checking Postage Rates in the Shopping Cart...
Please choose "United States" in the dropdown when attempting to view postage rates in the shopping cart. Choose "Puerto Rico" as the State/Province.
When Entering your Address in Checkout...
Here is an example of a properly formatted PR address:
Villas del Rio 213 calle Rio Yaguez
Humacao, Puerto Rico, 00791
More information regarding how to format Puerto Rico addresses is available at the USPS website: