Can I have a list of what types of businesses are covered by the DMV regulation?
It covers repair shops, inspection stations, dealers, junk and salvage vendors, and other automotive related businesses in New York State
And what if I don't agree with the outcome? Can i lodge a further complaint?
Yes there is the DMV Consumer & Facilities Services Complaint Unit. You must submit a Vehicle Safety Complaint Report PDF VS-35, downloadable from the link above, along with any supporting documents to them and your case will be reviewed.