I went to a shopping centre, 2 hours free parking then a code to pay on an app to extend if needed. Just before heading back to the car, baby (8 weeks) got upset as hungry. Baby is EBF, so I stopped to feed before heading back to the car. I logged into the app to extend and it wouldn't work. That's happened before and there is also a phone number for people without the app. Called that and it wouldn't recognise the location code, saying invalid. Previously that has worked but didn't on that day. So I had no way to pay. Fed baby as quick as possible, hurried to car. Now got a PCN through for overstaying 21 mins according to their AMPR cameras. Can I appeal as I was feeding and couldn't pay to extend?