A customer disputes their invoice because a technician replaced a cabin air filter without authorization. What is the supervisor's correct response?

1. Threaten to seize the customer's vehicle until the entire bill is settled immediately
2. Acknowledge the mistake, adjust the invoice to remove the unauthorized charge, and reinforce authorization protocols with staff
3. Inform the customer that workshop policies override standard consumer protection laws in Malaysia
4. Remove the new cabin filter and reinstall a damaged, dirty filter from another scrap vehicle