Shoddy workmanship for service technician.

I sent my vehicle in for a service and coolant flush. When I inspected the vehicle after a short drive the coolant bottle was almost empty and there was no visible coolant in the radiator. My vehicle went there in perfect working order. When I tried to tall call (after 8 am) I was informed it's too early for anyone to assist me or the staff are very busy. The worst offence is that the technician left their ***** driver in the engine bay which could easily cause damage to something else.