I will try my best to support in English here.
First of all: We are not an official Forum. We do the support in our free time and most of our members are not working at Unitymedia.
So we can only offer support from user to user.
So to your problem. I would recommend you to contact somebody who is able to speak German.
He can contact the hotline for you. I think your problem should be solved there very quickly.
A canceling of the contact should be no problem there.
BTW: You posted the thread in the wrong area. Here should only arrive problems with the Forum.
So I moved it to the right area.
I hope you can solve your problem