Most of the freebies are available in other countries on your local Amazon. I’ve tried to use links that redirect to your local Amazon, but it often doesn’t work. Either use the link and then change the end part (from amazon.com to amazon.whatever-your-local-amazon-ends-with). Or try to search for the title in the Kindle book section of your local Amazon. That will tell you pretty quickly if it’s free for you or not.
If it’s not free locally for you and you cannot download from the US Amazon, there’s not really anything we can do about it. Sorry!