I'm not surprised. Small, young purebreds are always snatched up.
If Chico hasn't been adopted yet, dont' give up! Send more emails, telling them why YOU are the perfect home for him and how much you want him.
Tell them anything that might weigh in your favour.
In the meantime, I will keep my ears open for any Chis. Would you take another breed, or a mix?
And if you haven't done research on this breed, you should do that too. Chis can be VERY hard to housetrain, they *can* be barky, and they usually bond closely with only one person.