No worries at all. Here's what will help you get the JioTune option back!
Step 1: Update to the latest version of the JioSaavn app from Play Store
Step 2: Connect to Jio mobile data (not Wi-Fi, or any other cellular data).
Step 3: Long Press on JioSaavn app icon and press on “i” button
Step 4: Go to “Storage” and do “Clear Data”
Step 5: Enable Jio data as mobile data option (Turn off WiFi)
Step 6: Launch JioSaavn app to see “JioTunes” section and follow “Step 3”