I think there was an article a month or so ago about the top tolltag runners the NTTA posted up and collection issues. Problem is they have no legal authority to asses fees more than the amount of the original toll unpaid. The outrageous gouge on your invoices your seeing is put there as a "attention getter". They are simply looking for contact in most cases to assure what they presume is your vehicle and/or phone #/ address.
https://www.ntta.org/custinfo/BIllin...Violators.aspx
Imagine what these fees would be if lets say "Amber Young" of "Dallas" calls in. lol
Im in no way advising you to miss a court date, but understand your rights before going there. If you have been getting invoices and not paying them shame on you, if not then explain that. I would even mention you attempted calling about your toll road usage(weather you did or not they wont know) but you were told you would receive your invoice in the mail. When finally received you were being assessed late fees for their billing misunderstanding.
Agree to pay the original toll amount no fees. People like solutions especially judges.