If somebody cares...
I called the german customer service center of TOEFL and they said to me that I did not receive my score report yet because my case was flagged with an 'issue' and that he could not help me.
I had to call the problem issue office of toefl in USA.
After half an hour they told me that my case said that I have had a cellphone with me during the test and before I can receive my score report a responsible person needs to check the case and IF they need further information they would write me. But all in all they could not help me and told me I can only wait.
But this will take a while (probably a month or even longer) and since I need my score report really urgent (I am already past the deadline of the university) I registered for another test and hope that this result will be available faster.
But I had to pay $ 280 again. F*ck you TOEFL!