Free Apple Music expired after I was added to family plan stating billing issue

Hi good morning or night I'd really love to know whats going on.

I recently bought my iphone in March and it came with a free apple music subscription, I claimed the free subscription and used it until it expired on December 3, 2024. Afterwards I was added onto my family plan and everything was fine, I was getting notices saying that there was a billing issue but I thought it was an error. The new year started and when I open apple music all of my stuff is gone! Every last playlist. Please help!!

[Re-Titled by Moderator]