I recieved a bill for toll road charges from the North Texas Tollway Authority. When I looked at the bill I realized the picture of the vehicle was not mine (it was a picture of a motorcycle), but they used my license plate number, I also realized I had not driven on the roads they say I was on. I called NTTA, and they basically said the burden of proof is on me. They have a picture of a vehicle that they are using as evidence, and it's obvious the license plate in the picture is not mine. What am I supposed to do?