How do you stop calls coming from one device coming to your device from iCloud (apple iPhone)?

I'm 13 and i don't have a credit card so i use my mums account and since my phone and her phone has the same icloud, her calls come into MY phone and i've tried making a new apple id but it won't work so how can i stop it (i've already logged out on my phone) so how can i stop it?

There's no way except you give it to me, even if you destroy the device still the bell sound stuck in your blank head

You don't have to have a credit card to use an iTunes Account (or have one). That's the reason why the iTunes Cards exist.

https://support.apple.com/...s/HT204034

Logging out should (have) stopped it since it isn't signed in.

So, I (again) suggest you make your own Apple ID & use that & that should solve the issue.