The main thing about these chargers is that nobody is monitoring them. At a gas station, an attendant is usually less than 20 feet away, and if anyone has a problem, they come talk to that person immediately. That attendant usually can't fix the problem on their own, but they can take steps to get it fixed quickly. By contrast, electric charging stations are typically at the far end of a vast sea of parking. There's…
The systems definitely have a method to communicate for payments, they should add a button to report issues with charger. Of course it's ripe for the button being pressed randomly, but I'm sure there's a smart person that can automate the messages received to catch that. But at least it would provide a possible mechanism to have frustrated users report these unattended units
If your charger used to generate $X/day and all of the sudden generates $0/day most likely its broken.