I parked in a garage that has an automated pay-to-park kiosk - you specify how many hours you wish to purchase, and then insert payment. For two hours of parking, the price was listed as $6. It was only after I inserted a $10 bill that I noticed the "exact change only" sign under the payment slot. So, I was effectively charged nearly twice what I should have been.
It was only $4, but I felt like I had been scammed and I went to the main parking office to request my change. They told me I would have to contact the company that actually processes the payments.
Am I legally entitled to my change? Or, did I "consent" to be ripped off because of the three words "exact change only"? My receipt even said that the total cost was $6, and that I paid $10.