Hello, I am just someone that is willing to help you with problems you may be having with your cell phone or any other problems. If I don't have the answer right away I can get it for you. I actually do work for AT&T so I have a little advantage over most. I am also in school for a degree in Integrated Technology. If you have a question or an issue with your cell phone of any type through AT&T feel free to ask.
If you have an android you can go to the market place or playstore and download an app that will reject it. If not then you will just have to call customer service at 1-877-430-CELL (2355) and ask them about rejecting a number. But most likely you will just have to change your number.
On straight talk phone u can go into reject list its under where u put in contacts and junk and then u can add numbers to that and it will send the person right to voice mail Although you cant block the texts from coming in.