Soundiiz supports importing Bandcamp playlists into other streaming services via the Share/playlist URL in your browser.
To do so, go to your playlist on the Bandcamp web interface and copy the URL in the address bar. Or, if you are using the Bandcamp mobile app, use the Share link for your playlist.
The URL should look like, for example: https://bandcamp.com/alfiepalao/playlist/v7
Then simply go back to Soundiiz, open the Playlists tab, click the "Import playlist" button at the top right of the interface, and select "By URL." Then paste your URL and follow the steps!