Thanks Frank
게시한 사람 meir shilo 속 독일 공개토론
unfortunately i don't think you are correct. Someone can write anything in T and C, there are regulations to what one can write or not, and to what period one can cancel any purchase he did, whatsoever the T and C one decides to write.
for example, they request fax 12 weeks before. I am not sure it is according to the general regulations of Deutschland tread regulations.i am in a weak point of negotiation as i am a foreigner from Israel in Germany, and did not expect this kind of issue in German 2016. I find it not respectable.