You don’t have to unsubscribe the subscription, but you have to give off Gb’s(gigabyte) for Apple Music.
This helps only if you have mac or iTunes installed in PC.
6 Step to follow in order to get your wish songs to your iPhone if isn’t in Apple Music:
1. you have to cancel iCloud music library.
“Go to setting >> music >> iCloud music library>> turn off”
2. Same do it on iTunes on Mac.
If you are Mac user “open iTunes >> click on the top left corner “iTunes “>>preferences>>general>>iCloud music library>> turn off.
3. Now connect your mobile to iTunes and add songs manually by drag and drop to iTunes.
4. Once if you feel all the songs have been added to your phone, then turn on iCloud music library on Mac and iPhone.
5. POINT TO BE NOTICED when you turn off iCloud music all the music will be deleted. Don’t be panic all the songs you added will be back when you turn on iCloud music library, but thing is you have to download everything from first. All your collection will be saved.
6. But make sure download all songs on your Mac and send it all at once, so that you don’t hve to waste Mb’s