Contract abroad

Hi folk,

As a lot of people here I'm trying to reach the customer service in English, but realised that it wasn't possible.

So I just had one question I left germany and my contract still has 1 year to go. Obviously I would like to cancel in advance.

As I saw there are some condition but it's possible, I would like to know where should I start and who should I contact. Is there a possibility when leaving the country, to cancel with a minimum of fees?

Thanks a lot in advance !

Cheers,

Alex