I tried to cancel my reservation with RentalCars.com but for some reason it would not let me do this online under manage my booking. It directed me to call a specific number in order to cancel the reservation. I did not want to call and we decided to stay with the booking. Come to find out the reservation was cancelled. I'm assuming manually without my knowledge. I called and spoke to an extremely rude customer service representative, John, who told me nothing could be done and hung up on me. We arrived at the airport with no car and had to book another one. Kindly refund me my $455.01 for this booking!