Uauthorized payments from my Apple CC's Cash Card. Yikes!

I just learned that there are a number of reoccuring payments from my apple card's cash account that have been made by a to-me unknown scrabble of letters. Took me 2 months and a cleaned out cash balance of about $200 to discover this. First thing I did now was request a new card. I assume that means that those withdrawals will stop. But how can I get my money back? What is that entity? I tried to look them up on the internet—nothing. Who can I contact at Apple CC to tell me what it is/was, and how that could happen. I think I'm so careful, and then this.