Poor Customer satisfaction

Today I got to the airport to drop my wife and kid, at the boom gates they advise that 0-30min free parking, I got to the ticket paying station within 26 minutes and was advised to pay so I spoke to the security guard who at the time was standing nearby and showed him that I still had time and was being asked to pay, he then showed me to the counter, so went to the Lady at the counter and advised her that I still have time, why should I have to pay, she (probably not knowing who to inform or query with) put the ticket in several times and then called the guard, by this time, the guard arrives and advises the lady that the machine is fine and that i must pay for the parking, failing to understand what i was trying to say, she tells me that i had gotten to her after the time had ran out, however, i had showed her the time on my cellphone when i approached her by then i still had 1 minute to spare, she advised that i was lying, with the time wasted, i then asked for my ticket and proceeded to the pay station, whereby i advised the security guard that he should advise them that the machine time was incorrect, i was then tol that nothing is wrong with the machine and that i was imagining things, if at the time, i was imagining things, that should clearly mean thatthe airport time and my time at the same time is incorrect, these staff clearly dont know how to communicate with Visitors at the airport.