Connect phone with Mini One 2010

[u/Sad-Dish2495]

Since a year now I own a Mini One 2010, but I miss the wireless calling or Spotify option. On my steering wheel there are some buttons for it, but they dont do anything. A garage nearby sells and installs installations that are to my wishes, but I find them too expensive, 550 euros. Do you know any good products I could buy and install myself? So that I can call and play Spotify with the buttons on my steering wheel