Here is an update:

So I still have yet to get an actual response from Hertz about the issue, the supervisor I was talking to did not get a response from claims yet.

Hertz did forward my email to Viking Billing Services without replying to me because VBS gave me a call this morning. From what I know there was an issue with a rear bumper, but VBS does not have any supporting documents yet (two weeks after sending me a letter). Also VBS said that they still can't do anything about actually changing the bill and I have to contact hertz.

It is kind of frustrating that they took the time to see my email and just forwarded it instead of talking to me.