funtonia.com lied and took more money out of my checking account then they were supposed to, now it's severly overdrawn, and there's two amounts taken out the same day, totally about 50dollars which i dont have to Internet

i recently ordered from a site called funtonia, i thought i was getting a great bargain for ringtones, at    1.99, i wanted to go back to the site to cancel my subscription, bcause i wasnt sure if i wanted it anymore, i had some trouble getting back on the site, and when i was scrolling down i saw a site about other ppl getting scammed by this company as well, curious i looked at my checking account and to my surprise, they took out almost 50dollars from it, i dont have that amount in my account, so now it;s overdrawn, which means i have to come up with that money now, very upset about this