Waterproof Mp3 Player for Swimming, Tayogo IPX8 8GB Underwater Music Headsets for Sports(4 Pairs Earplugs)-Yellow

Is it possible to replace the player? the headphones stopped working, one by one. never used it in the water, btw. i got the player in dec 2021

Only 1 song plays? when i put it in the computer, all mp3 files play on windows media player. when i put it on the headphones, only 1 plays on repeat.

Does it have am/fm radio?

Will this work with Amazon Music instead of iTune?