LumaSlim Garcinia Took too much money! California

I ordered from luma slim and got the free trail which was $4.95, at least 4 weeks ago. Yesterday I was charged $79.95. I looked into it and read bad reviews that claimed they'll automatically charge that amount after 14 days if you dont cancel the order. I looked at the confirmation email with the reciept and theirs no way to cancel the order unless you call them or email. I read alot of people had a hard time calling so i decided to email. Now I am patently waiting for them to respond with -$114 in my account. 79.95 from them and 35 as an overdraft fee. Also i'm a college student who has enough to worry about.