Falsely Charged A $400 Cleaning Fee

If I could give zero stars I would If I could give zero stars I would! I rented a vehicle from Hertz in Nashville TN and turned it in at the Bishop Airport Hertz in Flint MI. When I dropped the car off nothing was wrong with it no smell nor was it dirty. A few days later I noticed that Hertz had charged me over $600 for a $200 rental. I called them to see why and they told me they charged me $400 for a cleaning fee . I was totally confused as to why would I be charged a cleaning fee when the car wasn't dirty, (I did have my grandchildren with me but they didn't make a mess at all, they were pretty much sleep the whole ride.) The representative told me that in their notes it said the car had a strong odor, now I'm really confused!! I said what strong odor??? I don't smoke and me and my grandkids don't stink so what odor?? I talked to a few different representatives no one could tell me what kind of odor it was. When I dropped the car off it didn't have any type of odor. I really hate I rented a car from these people, its like they can just take your money and say f*** you!! I am a hard working mother & grandmother it's just hurtful for a company to take your money for nothing and there's nothing you can do about it. I rent cars all the time and never have I experienced this. Everyone I talk to at Hertz keep saying the charges are valid and there's nothing they can do. I really want to talk to the person that checked the car when I turned it in, I want to know what odor did he/she smell because there was no odor. Hertz need to have multiple people inspect vehicles when people turn them in to be sure because I'm really being charged for a false odor. I will never rent from these people again and I am informing others about my experience and advising them to not rent from them. I am currently looking into legal help with this matter and sadly a law adviser informed me that Hertz has a history of over and falsely charging their customers and have a lawsuit against them for renting cars then reporting them ******!!! Hertz or any car rental agency that's has anything g to do with Hertz will never get the business of me, my family or friends ever again!!