In 2014 I rented a car from XXXX, XXXX in XXXX. During the rental period, without damage to the vehicle, the car experienced a flat tire. Upon return of the vehicle to XXXX at XXXX, XXXX, it was determined I was not at fault for the flat. There was no damage to the tire and this was admitted to by the agents to which I returned the vehicle, otherwise in perfect condition. Three months later, XXXX applied damage costs of nearly XXXX dollars to my credit card. I appealed to my credit card company and the charges were reversed. Since, XXXX has turned this debt over to a US collection agency. I am receiving up to 10 phone calls per day. They have not sent a letter to me to substantiate the charges as it appears they are required to. 

I have a perfect credit score and have never defaulted in any debt, nor even been late in payments. I feel that the charges XXXX has attempted to apply to my card post my rental were egregious and bordering on criminal. 

The collection agency has not corresponded with me other than an initial letter in which they asked for my explanation of the debt. They have not substantiated the debt by writing.