Galaxy A3 Advice needed

I need some advice please. The S voice app on my A3 has stopped working. It says it cant find a network connection. Googling around I have discovered that the app has been discontinued anyway, so maybe that is why it has stopped working. Perhaps downloading another voice control app would be a better way to go. ALL I want to do is make voice controlled phone calls in my car, and select my music playlists (from music downloaded on my phone) not YT or Spotify etc. Is there an app that will do this on my Galaxy A3 please ?

 

Sorry I am pretty green at these voice apps..My phone has Google Assistant, but when I ask GA to say ...play one of my named playlists on my phone...it takes me to a similar named playlist on You Tube. Someone advised me that GA was made to plg Google sites, and would not select my downloaded personal playlists. Is that not correct ?