Car phone

I drive a S80 2.0 T, am super satisfied with the dare. When buying I had a 10x CD changer installed by the dealer and started the problems with it. Due to improper installation they damaged me of the middle console, the radio part and the telephone part. Everything nice scratched. I pick up the dare from it was already dark so not exactly everything looked after. I noticed the defects only the next day. The result my dealer of “detaching” had to put on warm clothes. I The phone also had to be replaced because they had to destroy the card reader however they managed to do it. The damaged center console (outside) I got replaced nciht. Since this new phone there are problems. Despite that it is sounded off it rushes in the speaker in the headrest. It was allegedly played up at the dealer of my Veertauens a new software but it did not improve anything. Can I in d his direction someone further help???? Thank you