Carrental

When we arrived at Priceless Rental Car site we were told that we would have to pay for a list of items as the car was a 'Fleet Car'. Our amount paid was $145.77 with $174.52 due at car pick up. We were informed, since a fleet car, we would have to buy their mandatory insurance at $30 per day; we could not use ours. Also informed we had to use their mandatory transponder at $19 per day; we could not use ours. We did not yet get to the gas or senior fees that were to come. Now our basic amount due was changed from $174.52 to $384.62. The additional fees were license fees, cleaning, location, vehicle license, airport facility, airport access, and state surcharge. The charges now were much higher than on our statement. The CSR stated that we could cancel our reservation if we desire since we felt the costs were unfair. So we did, and they returned us back to the airport. We cancelled at the car site because we were being greatly overcharged and want a full refund. I was not going to spend $1000 for a one week car rental. When I called back for my deposit on July 7,2022, I was informed that Robert, CSR, that had credited back my amount at their auto site and informed me I would have to call CarRental.com at *******640 for the deposit amount. The email response from carrental.com was cancelations or modifications are not allowed as per policy. We were cancelling due to a gross change in a total rental cost from about $400 to $$1000 per week. This is absurd and should not be allowed to occur.