If you find a free download link, check the file size. A 3-4 minute song at decent quality should be 5MB to 9MB. If it is under 2MB, it will sound terrible.
Furthermore, the song introduced global audiences to the concept of "Afro-fusion" before the rise of artists like Burna Boy or Tyla. Freshly Ground, ironically, became a household name worldwide when they collaborated with Shakira on Waka Waka (This Time for Africa) for the 2010 FIFA World Cup. That exposure sent millions of new fans back to find Nomvula .
For the best audio quality and to ensure the artists are supported, look for the track on these primary legal networks: