Vroom Overcharged for title and registration

My purchase experience with Vroom went well. Everything as promised. Easy procedure. However, when purchasing my car tag, I noticed that the amount of the license and registration fees charged on my contract was about $200 more than the actual amount of the license and registration charged by the tax collector's office.

I have contacted Vroom on 3 or 4 ( I lost count) separate occasions concerning this matter, but am always told that someone in license and registration will contact me. I was told that they contract out the license and registration procedure to another company and must check with them concerning the matter. But, I am tired of waiting for a resolution