You must be dealing with the wrong NCT people. What you have to do it pay your €50's & then submit an APPEAL to head office. They will refund you the money.
Alternatively, if you are a nice well mannered, non-blonde person like me, they will not charge you in the 1st place. A little respect & common politeness goes a long way.
Just like you & I, they are men with wives/family etc doing a job that is often thankless & un-appreciated. Its my belief that NCT has improved the quailty of the car's on the roads of modern day Ireland & its a MAJOR plus for people selling cars.
Can you imagine been in a job where the 1st sentence that most people say when sitting in the waiting room is " this fooking place is a pure rip off, safety me hole, license to print money " , you hear that enough times & you start to believe it. I know several NCT people in several centre & they are a good hard working people.
The same words could used for Garda, Traffic Wardens, Cus & Ex, VAT + Revenue personel, all these people are also caught up in red tape well beyond their control