Hello,
From your reply it's pretty obvious that you try to protect Sixt at any cost but I'm afraid that you missed the point.
1. Sixt specifically said that I should fuel Benzin and not Diesel. why shouldn't I trust Sixt representatives and check it myself in the contract ?
2. After the car broke down, I called Sixt from the vacation location in Krov and had to pick up an alternative car from the nearest location in Frankfurt-Hahn airport. Sixt promised on the phone to reimburse the taxi cost and later denied it - Again Sixt proved themselves to be not trustworthy.
Regarding the language - Sixt is expected to talk English to foreign customers. English is the acceptable international language around the globe.
Also in Israel (and other countries) all service giving companies speak English.
In light of the facts mentioned above, why should I pay for Sixt mistakes and accpet the hostile customer service from Sixt ?