If it exceeds the minimum consumption, it will be charged according to your real-time fee.
The voice call fee outside the package is your extra call fee. You can call customer service directly, and they will tell you the reason in detail. You can also check online yourself, which may not be clear, and finally you have to call customer service.
I suggest you ask customer service and change the package that suits you.
That's it. Thank you for your adoption.