North Texas Tollway Authority [NTTA] review: Unethical billing practices - unlawful fees

I want to file a formal compliant against NTTA. On three different occasions two last year and one February 2020, I contacted NTTA about billing issues regarding my vehicle after it went through toll booths on a texas highway. On several occasions I was charged excessive fees not due to ignoring the bill but that the invoice not being received.

On three different occasions, I informed NTTA about the issue and stated it wasn't fair i was charge late fees, administrative fees, and other excessive 2nd and 3rd late fees on invoices. They stated the invoices were sent to my address and I informed that they were not recieved - which I can confirm the address they used was not my address. I only found out about the excessively charged invoices notices after I received an email from NTTA. I am puzzled why they didnt send an email earlier with the bill was first outstanding, or have it automatically be sent which I could have paid it at that point. But, for several invoices, where the costs was $5, or $10, the bill ran up to $100s. Some of the invoices were at collections level and had many excessive fees added mounting up the bills to be in the 5 times more than the original charges. Each time, I contacted NTTA asking some or all of the fees to be removed but they declined stating I ignored the bill which is not even the case. I provided my correct address each time, but they said they couldn't put it on file, but when i asked for all outstanding invoices be sent to me they mailed them to the correct address. They said my address could only be updated with DPS, in which I am very surprised as they were able to mail the invoices. But, I am asking something be done in regards to this as this is at least the 4 time I have been excessively charged and at this point --- I will NEVER USED toll road in the state of Texas again as I no longer want to go through this with this entity (NTTA). I ask for some type of resolution and restitution of funds. Sincerely.