I want my Money back please! Refund. 7 day free trial...

I started the 7 day free trial yesterday and the money has been taken out of my account. I would like a refund as I only wanted the trial; not an account in minus, all because of a stupid app that was ment to give me 7 days before taking that money. How disrespectful and greedy to customers and a bed reputation for potential customers. Please give me my Money back!!