Spoofing a number means they can call somebody and appears as calling from your number. In order to receive SMS or call made to your number, they would have to hijack your SIM, typically convincing your telecom provider to transfer your phone info over to theirs.
In the US, someone knowing your full name and phone number is commonplace. There is no wide-spead havoc because of this. Someone who wants to harm you would really have to be motivated to get more information from the info you gave them. This is obviously possible because of wide-spread data leaks, but does your emissary have the perseverance and the knowledge to do this?