mishandled assistance for disabled vehicle

Although a hertz gold member I used roadside assistance for the first time 2 weeks ago.  My virtually new rental car stopped runnning (no fluid in radiator, due to leak) and was infuriated that the company's answer was for me to take it to a garage to have it looked at . I was 30 miles from the nearest rental location and they finally send a towtruck after an hour.  I was told the car would be put on their flatbread with myself and my four passengers and taken back 30 miles in the wrong direction of my business trip to get another car.  I could not conceive of 4 people in an un-airconditioned car being trucked to God-knows-where to wait for another car.  One should have been delivered to me, for heaven's sake!
I opted to take my group by cab to my next stop in Central Ohio to get another car.  As this turned out to be a franchise rather than a company store, I was forced to pay a higher rate than my contract and for 1 less day.  My previous contract has not been cancelled.  I have contacted Hertz via their survey (try reaching them another way!) and have heard nothing.
What are my options to get restitution for this debacle?