Uninstall any unofficial version you may have installed. Then:
: If downloading an APK directly, you must enable "Unknown Sources" in your phone's security settings before opening the file. Google Play on your device? Download Jazz Cash Old Version APK (9.0.42) - Gamuters jazzcash 9042 apk new download
Locate the file in your downloads folder and tap to install. Quick Access Uninstall any unofficial version you may have installed