Avis Rent A Car Avis Budget Group over charge Mississauga Ontario

Month ago I rented a car from this operation because they offer a deal of 3 days $90. I signed a contract after the staff briefly explain the clause. I barely remember those clauses but one thing for sure I hadn't hear anything about insurance charges.

Amounts you will pay always sensitive to most consumers, isn't it? besides my credit card has insurance coverage in the event I rent a car. They charged me $450.85 for 6day of rental. I called, each time take an hour to reach a person to talk. 

My rental receipt shows time and killometres: $194.40

Environ fee 0.15/DY                      $0.9

energy recovery fee 0.98/DY        $5.88

Eh Lic fee                                      $8.82

Late fee                                         $15.00

optional Service total taxable        $174.00

Actually I used 5days, return late, they charged full day rate what that late fee mean? Optional service fee they explained that's insurance, what's the hell?!!!