Hi Orda
What awful service and rotten attitude.
I use Hertz all the time and have done so for many years.
I have booked with them directly in many countries in Europe and never had a problem. I have found them quite efficient, except for a little misunderstanding in Portugal, which was soon resolved. Their rates are also quite fair.
It is a shame you had this experience and I think if you press it with them it could be resolved.
From what you say you appear to have booked through a third party (Auto Europe) maybe the fault is with them.
Why not try your credit card company as well as both the above.
Anyway good luck to you. Keep pressing for a resolution.
Just thought I would share the good experiences I have had with Hertz.