Are you saying that you were actually charged (i.e., money was removed from your bank account), or are you saying that you received an email saying that you purchased these items, but that is the extent of it?
If you were actually charged, then go to: Report a Problem, find the itme(s) in dispute, and report them using that tool.
If you have only received the emails and nothing else, then they are likely phishing attempts. Read this support article send the emails into Apple before deleting them: Identify and report phishing communications - Apple Support
Best,
GB