My daughter's keep receiving phone calls from 977 1141. She's instructed not to answer calls from unknown numbers. I called back to check what is going on and was greeted with a recording saying "Hi, this is Vodafone. We called you to check if there's anything we can help with".

 

Obviously it's an outgoing promotion and they don't expect to answer the phone if anyone calls back.

 

I can obviously block the phone number on the phone itself but is there a way to tell Vodafone to stop calling (short of being around when they call next time)?