Rentcalculators.org Charged my account never sent calculator, contined to charge account every month Norwalk California

 On september 17 2015 i was in search of a graphing calculator for my statistics class in college, i did not want to spend 100+ dollars on a new one so i was informed by my professor that there are websites that rent out calculators on a monthly basis. I googled for a website and one of the first to come up was Rentcalculators.org, the website looked legit and was based in norwalk california closed to my hometown. Little did i know it was a total scam. I ordered a calculator for about 35$ for a deposit which i was promised a refund when i returned the calculator, and a 9$ first month rent charge. Once i placed my order i received no confirmation email or any kind of contact. Which I instinctively thought was strange. A week goes by, no calculator. I called the website's # and emailed countless times. No responses just recordings no contact from them at all. I did research and was beginnging to conclude i was ripped off. I finally receive a email about a month later from them stating my calculator was shipped out. I never received the calculator. Again i called and emailed countless times. Nothing again... I decided to do research and found reviews stating this is a fraudulent website and a scam. This is rated an F on better business bureau. I concluded they are indeed a scam, they dont respond to calls or emails, they use a p.o box address which is hard to trace down. The whole website is a false advertisement. 3 months later i am charged 9$ every month on the 18th. I have successfully disputed these charges with my bank but are being charged aa of today. 12-18-15. I am on a mission to stop this company and will gladly take any help or tips on how to go about stopping this "company" to prevent it from happening to anyone else. DO NOT USE THIS WEBSITE!