Bill i did not ask for..
Why do i got a Bill for more iCloud-space i did not ask for??
This might be a scam email.
Check if the purchase is in your purchase history:
See your purchase history for the App Store or iTunes Store - Apple Support
Take a look at these articles
Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support
Identify legitimate emails from the App Store or iTunes Store - Apple Support
You can report it by forwarding it to reportphishing@apple.com.
Hope this helps!