I think you are being scammed. Apple does not make many billing errors. But, see If you see apple.com/bill, itunes.com/bill, or an unfamiliar charge on your statement https://support.apple.com/en-us/HT201382. Assuming you are being scammed:
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 after you change your Apple ID or password https://support.apple.com/en-us/HT204071
Learn about Phishing, Scams, Apple Practices,etc.
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
See How to avoid scams when using Apple Pay to send and receive money https://support.apple.com/en-us/HT208226
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