I need some help on abandoning my car?

I have a car, that is now totaled bc of an accident. The loan, I'm still paying on it, the place (credit acceptance) that gave me the loan isnt interested in the car, they WONT repossess the car!!!! I told them that I'm still pyin on it; i even asked them why dont they take off the lien on the title so i can atleast junk the vehicle??? they tell me "NO". So, im stuck w/ this car!!! I was thinkin to drop the car off at the corp. office prkin lot, since they wont come get it, but i was told I'll be billed for abandonment, after they run the vin and such, so I'm thinkin.. cant i just scratch the vin numbers off??? and then adandon the vehicle??? the plate is removed and my paper work is also out of the car?