Sixt.com Unrealistic penalty fees equivalent to a ripoff Beirut, germany, Germany, Internet

Rented a luxury SUV from sixt.com and completed the payment 4 weeks prior to my trip. My trip got canceled, so i canceled my rental 3 weeks in advance and received a email from sixt informing me of the succeful candelation. What they omitted is the refund and the penalty fee, if any.   Just like any airline, i tought they would make me pay 50 dollars or something for the cancellation. But no, with sixt they make sure you pay and you pay heavily. My rental was 620 usd, the penaly was 470 usd. Yes, 470 usd for a car that they will rent probably to someone else! This is a first class heist in broad daylight! This is a company that makes it's revenue from penalties and not rentals. Do share holders know that! What kind of comapny is this and how they make them operate under such policies!? Don't rent from sixt! It is a front for something else!