Why being charged for Music I uploaded into iTunes

You don't need to pay for Apple Music, or iTunes Match, to listen to music from your own CDs. You just need to do iTunes-based or Music/Finder-based synchronization from a Mac or PC.

You do need to pay for Apple Music or iTunes Match if you want Apple to "match" the music from your CDs against their library, and download copies of songs from their library to your (other) devices. When iTunes Match came out, Apple sold that as a way of upgrading your songs to 256 Kbps AAC quality. But sometimes iTunes Match will make bad matches and overwrite songs with different versions, maybe even entirely different songs.

If you use the Sync Library feature of Apple Music, I believe it will put DRM on tracks it downloads … and those will stop working when you stop subscribing to Apple Music.

The source of the confusion here may be the word "uploaded". If you told Apple that you wanted to "upload" songs they may have thought that you were talking about matching your songs against the ones on their servers, and then uploading any for which there was no match.

The term for pulling music from a CD into an iTunes or Music library is "importing."

Hi,

You need to keep a backup of your music on your computer or external hard drive. If the music is solely in you iCloud music library, you need to keep an active subscription to either iTunes Match or Apple Music. You will lose access to this music once your subscription expires.

Jim

Hi,

You don’t need Apple Music subscription to play your own music. See If you want to cancel a subscription from Apple – Apple Support (UK)

Make sure that all you music has been downloaded.

Jim