Sent them some Bitcoins four days ago, and received a pending confirmation right away. Then nothing
A day ago emailed them, and received no reply.
Now what? Keep waiting or write it off as bad experience and book somewhere else?
I think it's safe to say you got scammed. Sorry that happened to you.
Unfortunately, scamming is very common in the Bitcoin world.
It is like the Wild, Wild West - only wilder. Be more careful next time!