Unprofessional business practices

One of their 'technicians' came to my place to take two dents out of my vehicle, he stripped the paintwork of my vehicle while trying to pull the dent out. The owner told me that their is always a risk in removing a dent, especially if it sits in an awkward place, where the paint on a vehicle might strip. He told me he is not going to charge me for the dent removal, but must pay for the respraying of that stripped paint , which their 'technician' caused. Furthermore the dent was not even removed, but I had to sit with a vehicle that was damaged by them. The owner told me that if I don't want to pay for the spray work, then he will leave it at that and tell his emplyees to leave my place without fixing the damage that they caused in the first place. I believe it was ********* of the owner ( Frikkie) to expect me to pay for the damage on my vehicle that they caused. I had no choice but to let them stay and continue with the spray work at my financial expense, because the owner threatened to leave the job if I don't agree to pay for the spraywork. I'll let you decide if this was ethical and fair.