This is a real bad comment. You are blaming a nation for your problems with a product!?!? Why are you asking for help in a german language community?
You may remember that the C3 is available since years and some 1000 users have bought it and are happy using it. I used to have one myself but never ever I have heard of an experience like you are going thru now. The manual is may not the best but it is surely better than the most. Especially the level you are currently failing on, is fairly good covered,
So, before blaming "german quality" for that trouble, you should be certain that your transmitter is not simply broken or you are just not able to read and understand how it works.
However, the way you are describing your problem, the fact that you just and simply start writing in english even though this is a german language forum, the fact that you are obviously not familiar about how to work with a forum like this and you could not even pick the correct category for your thread ... all that make me believe the problem is not your transmitter.