Greetings, Renganis.
Do you have access to a PC? If so, check out:
"Add items to your device manually
You can add music, movies, TV shows, and podcasts to your device manually. You can’t add photos, contacts, or other info manually.
- Connect your device to your computer.
- You can connect your device using a USB or USB-C cable or a Wi-Fi connection. To turn on Wi-Fi syncing, see Sync iTunes content on PC with devices on Wi-Fi.
- In the iTunes app on your PC, choose an option (Music or Movies, for example) from the pop-up menu at the top left, then click Library.
- In your iTunes library, click Downloaded in the sidebar on the left.
- Note: You can only add items you downloaded to a device.
- Right-click an item, choose Add to Device, then choose your device.
To remove an item that was added manually, click On My Device, select an item (or items), press the Delete key, then click Delete." Sync iTunes content on PC with your devices - Apple Support
We hope this helps!
Sincerely.