Soundiiz is supporting the import of Wynk playlists to other streaming services with the Share link provided by Wynk.
For that, simply go to your playlist on Wynk and use "Share" button to get an URL using "Copy Link".
The URL should like for example: https://wynk.in/u/FsJDVdULm
Then simply go back to Soundiiz, tab Playlists and use "Import playlist" button in top right of the interface and select "By URL". Then paste your URL and follow steps !