I sold my car privately to a guy working at some car dealership. When i sold the car i had my own stereo in it. I told the guy that i will be removing my stereo before he can pick it up.
When the finance went through the guy rang, being very rude, requesting to pick up the car ASAP. I told him that i haven't removed my stereo yet and he said that i had heaps of time and that he needs the car TODAY.
So that afternoon after work i just pulled it out myself and didn't plug the old dash back in.

WELL now they called me back stating that the original dash stereo doesn't work, to which i explained how i was going to pay someone to remove it but because then wanted it ASAP i just took it out myself.
They now what me to pay for the costs to fix it.

Where do i stand? do i have to pay or not?