A traveller is lured into a private vehicle at the airport by a man posing as an official e-hailing representative, then held for payment of an undisclosed, inflated fare.
The scammer is using your physical presence in the car and your luggage in the boot as leverage to extract a payment you never agreed to. The Consumer Protection Act prohibits exactly this: misleading a consumer about the nature and price of a service before it is rendered. You cannot be legally bound to pay a price that was never disclosed upfront, especially when the service provider misrepresented who they were.
After you respond, they may push back with these arguments. Members get the full rebuttal for each.