OP, can we go back to the permits pl.
Your account and the vouchers are at odds on the face of it. The permits are very badly worded IMO. If you took their instructions literally then drivers are hostage to events outside their control.
Why?
Because the permits state:
Visitors Hourly Parking Permit
Scratch out time of arrival.
So, how might a driver apply this when parked in a part-time bay?
Display the permit when parking but don't mark this time, mark when the restriction comes into force?
Don't display the permit until the last minute and scratch out the time when the permit is displayed?
Is there anything on the back which helps a driver interpret the otherwise clear but very difficult to comply with instruction on the front?
If not then the circumstances at 10am would have been beyond your control.
If not, could this be fed into your reps?
We haven't seen your initial reps so don't know what you've already said.
At least you could bat away any argument that you should have chosen a quieter time to fill out the permit i.e. children eat when they will; had to wait until nearly 10 so that you wouldn't be displaying a permit which indicated your arrival X hours into the future; perfect, or imperfect, storm of events.
And acknowledge making a complete hash, in fact the only thing you got right was the time..and even this wasn't when you arrived/displayed the permit!