New Jersey EZPass New Jersey Turnpike Authority Fined me 50.00 after I Paid the toll - and I have proof of payment New Jersey

I ran the entire New Jersey Turnpike going from VA to CT on 12/22/17.  My ezpass paid the full 13.85 toll.  I can see it in my ezpass detail.

I got a letter from NJTP dated 2/15/18 which I received on 2/20/18 with a photo of my license plate, saying I owed a 4.75 toll and a 50.00 service charge.

I called, waited on hold for 30 minutes and talked to a representative, who told me it was just a system glitch.  Per her instructions I printed my virginia ezpass detail, circled the proof of payment, which was at the exact same date and time and toll plaza, and mailed back the dispute.   I thought that would take care of it.   

One detail: the toll plaza, date and time were exactly the same, but the specific toll booth was different between my Virginia ezpass report and the New Jersey Violation.

On 3/9/18, I got a letter from them stating that my dispute was denied because the 50 day time limit had passed, and therefore I had to pay.  The initial letter was dated after the 50 days!  I never had a chance to dispute it!  I'm going to pay it, because I'll be making that trip again, but this is simply state-sponsored extortion.  Their system has a flaw, and I have to pay for it.