Fraudulent Charge

Rental Agreement C3319009.  with Universal Rent  A Car.
Arranged by CarRentals.com

On the morning of 18th February 2008, I rented a car through Carrentals.com website to go to the airport that evening.  The car was picked up from Universal Rent A Car, situated on 5400 Dixie Road, Mississauga.  The agreement was that on return we would be dropped off at the airport.  I, my spouse and another couple used it for the transport to the airport in the evening.  As we had to report at the airport at 4.30pm, I arrived with another passenger at 5400 Dixie Road at about 4.30pm to return the car.  We stayed there for a long time to be attended to.  However the person in charge was on the phone for nearly half an hour.  Saying that we will be late to the airport, one of the junior officers came over to clear our vehicle.  He, along with both of us went around the vehicle and did a vehicle check up.  Then he checked inside of the vehicle and the odeometer.  Then he asked both of us to hop in and that he would drop us off at the airport.  At that time we asked for a receipt for the vehicle return.  He said that his boss was busy on the phone and it was getting delayed to go to the airport.  He said that it would be sent in the mail.  I trusted his words and left for the airport to fly out of Canada.  
We returned to Toronto late on the 26th evening.  On checking the messages on the answering machine the following day I found a message from Universal Rent A Car.  It was to say that there was a damage on the windshield and that the cost of the repairs would be recovered from the Visa Card.  I wish to state that there were no windshield damages on the car when I returned it, or was any pointed out to me at that time.  The rental company now maintains that there was a windshield damage on the car and that this was pointed out.  However, I still maintain that there were no windshield damages on the car and also if it was pointed out at the time of taking delivery why should he leave a message later on my answering machine.
I also took this up with Carrentals.com and it merely forwarded my email to Universal Rent A Car and replied to await for a reply from Universal Rent A Car.
The rental charges for the day was only $25.71cts, but the rental company had charged $282.00 on the Visa Card.
I give my 'phone no. in case you wish to contact. It is 416 438 7138.
I also give the 'phone no. of Universal Rent A Car and it is 416 676 2021.
Thank You.