Gotta love getting a snake for free because theres a "problem" but then when you get it there is no problem. I got one of my bps that way. they just bought it, had it for 2 months and couldnt get it to eat. I took it home, the same day offered it a hopper mouse and not even 2 secs after i dropped it in it ate.
Congrats on the snake hope it all works out for ya.