PARKING SCAM at Main Street Station Casino in LAS VEGAS - $20 Free Parking

This is video of play at Main Street Station - Machines were tight, Card Readers not working and some machines would not take bills or TITO's. I got my parking Ticket Validated before playing and was told it was good for 24 hours
Then the Parking guy told me it was $20 for PARKING even though we were parked under the FREE PARKING SIGN.