I'm not sure if they will give you a free sample right off the bat.
What I did was email them that I was disappointed with the selections that they sent me (for example, I ordered the black sampler, expecting Irish Breakfast to be included, which I really wanted. When I didn't get it, I emailed them and told them and they sent me a sample for free)
On the Oolong sampler, they sent me two Jasmine samples, then said that they would send a different Oolong when I ordered again.
Sorry if my earlier post was confusing.