Hi, good day!
I'm sorry, this is just a Community Forum, and we do not have access to your account. Because this request may require sensitive personal information, it is best to contact Microsoft to process your concern.
Please try signing in to the Microsoft accounts you remember and see if you can see the charges there.
https://account.microsoft.com/services/microsoft365/billing
Please check the support article in the link below on How to investigate a billing charge from Microsoft.