3 complaints - Freephone Numbers
this adress may help you: nummernverwaltung@bnetza.de it's the adress of the german office post-and communicationbureau. much luck
The same with me - but only one time a day! But it's disturbing too, because I'm always rushing to my mobile to get the "important" call.. I'm really getting to hate these dipwads, who do all in their power to get money (please excuse my bumpy english)
Phone rings once and then the call ends. More than 10 times a day. Very disturbing!!!!