Check out your purchase history at the App and iTunes Stores https://support.apple.com/en-us/HT204088
I think you likely have the subject of at least an attempted scam.
Did you provide any potentially damaging information to anyone? If yes, you'll need to follow up, for example, with a credit card company, Apple, your bank, etc.
If you gave you Apple ID password to a scammer, then
Change your Apple ID password https://support.apple.com/en-us/HT201355
Here is What to do [before] or after you change your Apple ID or password https://support.apple.com/en-us/HT204071
See If you think your Apple ID has been compromised https://support.apple.com/en-us/HT204145
Increase the Security of your Apple ID https://support.apple.com/en-us/HT201303
iCloud security overview https://support.apple.com/en-us/HT202303
Ways to keep your information safe on Mac https://support.apple.com/en-gb/guide/mac-help/mh11402/mac
FYI:
See If you see apple.com/bill, itunes.com/bill, or an unfamiliar charge on your statement https://support.apple.com/en-us/HT201382
See Identify legitimate emails from the App Store or iTunes Store https://support.apple.com/en-us/HT201679
For scam related information from Apple including reporting scams to Apple see Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams https://support.apple.com/en-us/HT204759