Yes, thank you for quoting Let-Trade's refund policy - I have read it. But I did contact them within 72 hours of getting the first smelly bag and they told me I should use an "air freshener" in the bag for a few days - so I did.
They did not describe either bag as having a musty odor. So, no, the condition was not as described.
If they refuse to give me a refund, I will have to chalk it up to $1,000 of stupidity - and a lesson learned. Perhaps I'll see if I can find a place that can clean the bags to remove the smell - though I suspect it might not be possible.