I have done all of the steps already! I confirmed that my number was deregistered a couple of weeks ago - it already was. I've followed every step that Apple prescribes to fix this problem, but they haven't worked: I've confirmed that my number isn't anywhere else in icloud, I've changed my password for icloud, I've reset to factory settings on my android, I've texted STOP to the icloud support number. BTW, when I retested after going through the steps, the problem was worse. I'm testing with a small group text to my two people. Before, I received responses from one of them in the group, but after the "fix,", I received neither of their responses in the group text.