Product: Credit card or prepaid card

I Wanted file a complaint against capital one for not properly assisting me in a dispute against XXXX XXXX XXXX i rented a car in the amount of {$120.00} I had the vehicle extended until XX/XX/2019 and then extended it again to XX/XX/XXXX the car rental company was suppose to pick up the vehicle and never did they contacted me XX/XX/XXXX in hopes of getting the vehicle and agreed to have it back that following Sunday however the same agent who contacted me was following me Saturday evening and sent me photos of the car and i returned the keys to him and he drove off with the vehicle again he sent me photos of the vehicle park safely at the rental car location about a week or 2 later i get a charge for {$7400.00} on my credit card i reported to capital one to dispute couldnt get my contract from XXXX XXXX XXXX and tried to get that with an agent from capital one on the phone with me and the rental car refused to give me information about the charge they left the contract open so they charged me additional days that i did not have the vehicle they charge for towing etc and there was no towing involved as the conversation that was submitted to capital can show it was no towing involved no lost keys no warrants on the car so i been charged ridiculously a large amount of money i sent in my contract to show proof of what the car is for a daily rate and the amount is a lil over XXXX however capital one had the knowledge of that information told me its gon na take 45days to fully dispute the charge where the merchant has to respond and i did too i responded and the merchant didnt and they found it sufficient enough to hold me responsible for all the charges when Im not  responsible for that i do indeed know that i do owe them money but {$7400.00} is not what i owe at {$37.00} a day for a total of 53 days totals out to be {$1900.00} the contract states the daily price as capital one told me that they are only responsible to charge me for the days i has it and capital one told me the same so {$5500.00} of additional charges is frustrating so the receipts says additional days at {$67.00} a day is {$1400.00} still doesnt add up to XXXX i was only looking for help to resolve this matter and for them to properly charge whats really owed so now Im stuck with a charge on credit card that Im not responsible for because the charges are not accurate and capital one had assured me that they was disputing the charge and they did and i called for an update they said they couldnt help me i would have to reach out to merchant myself to get the matter resolved i feel like their very incompetent at doing their job because i did what was asked of me XXXX hasnt responded or even sent them any proof as to why they feel the charges are accurate but i get stuck with the charges and it wasnt a full 45 and they closed my dispute out without giving me the proper days and allowing XXXX XXXX XXXX to provide information pertaining to this dispute i feel cheated out and Ive been a loyal customer and on time credit card payments never late fees no late payments always on time and they couldnt back me up even with the solid proof before hitting the 45 day mark but instead the supervisors kept feeding me lies about helping me and they did not every time i call in for an update its no knowledge of the conversation when the calls are recorded so theres proof of wrongdoing not on end but on there end i just want a fair shot at this dispute and terms of getting this mattered resolved in which i got cheated out on