Kept getting sent increasingly higher bills to my ...

Kept getting sent increasingly higher bills to my old address when I repeatedly called to confirm that my only active account was the one I prepaid $30 to. Turns out it was a toll for my temp license plate but it took 3 employees over the course of 10 months to figure this out. I ended up paying $65 for what should have been a $9 toll since an employee I spoke with 8 months earlier gave me the wrong information.