You need to call the Cell phone Company! i know at&t will do it for free. I dont know about verizon and them. But if you just cant, go to www.youmail.com. Sign up, change the voicemail number in your phone. Then add the person to "block voice mail". And set "block voice mail" to "Unable to leave a message" So your voicemail just hangs up on them. I cant help with texting. Just calling. But i would suggest calling you company