Game Mine GameMine.com False Charge, Never Sent Game Pompano Beach, Florida

I joined Game Mine's rent service for video games on March 31st. They sent the first game and over a week later, I never received the game. After waiting several days, I cancelled my account. The service was not what I expected. Now they have charged my credit card without asking 50 dollars for a game that they never even sent to me. The merchant told me it is up to me to file a claim at the post office to find it? Why when he mailed it? It is his responsibility. This company is ripping me off.