Lack of materiality yes or NO?

Hello dear community have bought me 4 months ago a v10 tdi at the happy one. since 2 weeks no radio,cd,tel,or navi ton more everything quiet. am to the friendly where I bought it after reading the error memory, you said that you would have to play me a new software on the fat. but you can not do immediately because you first have to order the software cd. since I work professionally in Switzerland I could only 2 weeks later again to my friendly and the of course without music etc, so now have been up again and software played up nix (everything dead) so now it comes a control rope defective means the happy costs smooth 1600 euro + install the I itself should pay, since it does not cover the vvd he thinks. IS THIS CONDUCT CORRECT I have to pay the harm myself? thank you in advance.