If you have one or more specific complaints about the car and or the
dealership -- I recommend you contact the State of New York Consumer
Protection Bureau.
Their web site does not list telephone numbers but, you will find instructions on Filing a Complaint
here.
I don't know whether the one-day data error on your Bill of Sale would
give you any kind of a 'loophole" to get your deposit back.
You might also look in your Yellow Pages -- to find an attorney to talk
to that specializes in consumer issues -- many attorneys do not charge
for a first visit.
Good Luck!
Counselor /listener/collaborative problem solver. Thanks!