Dollar Rent a Car Elder abuse, fraudulant business practices Tulsa, Oklahoma Nationwide

My wife and I rented a car from Dollar at the Denver Airport. I specifically asked about toll roads and toll charges, and was told "Don't worry about them, just take the road and we will bill you". I have received a bill from Dollarrentalfine.com for the $10.10 in tolls (that I owe) plus $60.00!! in so called administrative fees.
Normally when there is an excessive charge at rental businesses there is a large sign mandated by law warning $9.99 per gallon of gas and so on. There was no sign, but certainly once I asked about these they should be required by law to mention huge fees such as this one.
This is obviously a lucrative scheme, as they have set up an office in Mesa, AZ just for the purpose of extracting their fraudulent gains from unsuspecting users of their service.
This is a fraudulent business practice, not to mention elder abuse, if I have ever seen it. They of course hide behind the fact that this fee is mentioned on the "contract" in tiny print towards the end. Of course they have you sign on a touchpad and agree to the wording of the contract before they let you actually look at it. Clearly they encourage (require) their counter people not to mention their outrageous fees. And clearly they don't want anyone noticing that they are going to be charging this, by making sure no one reads the contract until after it has been signed.
I'm glad to pay the tolls, after all, I owe them.
The $60 should be refunded, and this practice should be outlawed.