My reservation number is GR397359100230. I am very surprised about the 750.-Euro Selbstbeteiligung!
Did you take the extra insurance?
No, I thought that it was all inclusive!
I see that you have already paid for it. You will receive a number if emails following your reservation. You will have to print them and take them with you to show at arrival at the car rental desk of your supplier. If you want to change anything then log into http://www.amendcarhire.com