Lanseria Airport Security robbing people and clamping car wheels unnecessarily

We always use Lanseria Airport and my son always picks up and drops of my family members, today the 02/05 he dropped my brother off and he always park at the parking on the top and there is no boards stating its a clamp zone and neither is there security warning drivers they cannot park there, my son literally assisted my brother to take in his bags and was back in 5 mins and they clamped him and refused to let him go and insisted we pay R500, the problem is he always parked there before and never has this issue. Whilst my son was awaiting me to pay the 500 he saw this happen to another gentlemen that also parked there and the man stated there is no sign stating its a clamp zone and no security warning anyone, Lanseria Airport Security is robbing people to make extra money for them selves, and to top this off i made the payment and emailed the head of Security Kennith at 11.36 and he only let my son go at 12.20, they made him wait 46 minutes, they taking advantage as they saw my son is really young, i had no choice to pay the money as they refused to let my car go and they made my son wait another 46 minutes i have liaised with my attorney and i will be taking Lanseria Airport Security to court for tricking people into paying clamping fees when we parked at the spot before with no issues. people please dont use Lanseria Airport they rob young individuals to fill their pockets, i will be writing an Article and spreading the news abut Lanseria Airport robbing people by falsely clamping there vehicles and yet we used this parking all the time as we regulars at the airport.