Unexpected $49.9 charge for Apple Music family plan subscription

I have an Apple Music subscription. I have a family plan, but since last month they have been trying to charge an additional $49.9 from my card, I don't understand why or what. The money wasn't charged just because there is a limit on the card. I would like to point out that payment for the family plan is still being charged. I don't have any additional subscriptions. How do I solve this problem?

[Re-Titled by Moderator]

Original Title: Apple Music funds