Sonic Drive In

This place is terrible. My family of four pulled in for an afternoon cool down treat. It’s 97 degrees today!
So we order from the pull in. We them try to pay with a credit card. Nothing happens. So we don’t really know if our card worked or not.
The server appears several minutes later with our tray of drinks and ICE CREAM. She then informs us their machines are down.
My wife asks what should happen next since we don’t have cash on us. She asked if we would like to go find an ATM machine and get cash. She politely offered to hold onto the ICE CREAM until we returned.
NO! I will not drive away and try to retrieve cash and return to receive my now melted ICE CREAM!
We told her that we would simply go to the McDonalds just down the street and see if their machines worked.
She let us drive away and kept the drinks and ice cream, presumably to throw it all away.
Seriously Sonic. Is that the customer service you want to be known for?