Opel Corsa D - Steering wheel buttons not working properly

Hi everyone,

I want to ask for help if possible.

After i started my car i pushed the horn to make beeeep of course, after 20-30 seconds I tried again and the horn was not functioning.

I started to try my steering wheel buttons and i realized that their functions were mixed like e.x horn was lowering music volume and up/down volume buttons were actually changing songs on radio.

My car is an Corsa D 1.3CDTI ecoflex 95HP (111 edition)

Thank you in advance.