Voltas — Air Conditioner improper and damaged service

Recently i have booked an appointment for my voltas ac. The technician arrived and did what he can do. But he left a bolt open to the outdoor unit and it stared causing heavy kirrrrr sound outside and also they manually opened the wings / blades which is why they stopped working now. They are not opening not closing. Motor is attempting to close them but they are flapping with sounds to close.

Please help me.