I'm sympathetic. Motorway service areas are supposed to be 'places of refuge'. Unfortunately, under the Supreme Court ruling in Beavis v Parking Eye 4-11-2015, parking operators are entitled to impose "reasonable" penalties for breaches of their terms and conditions, so best to pay the £60. There is a private members bill afoot to change this, second reading to widespread cross-party support in February 2018, but parliament has more on its mind at the moment.