(((((((((((((Richie)))))))))))
I am sorry for the pain you are feeling. I don't know exactly how you feel becuase fortunately my parents left the org with me and my family. But I will tell you from a mothers stand point, there is nothing that my son could do that could take away my love from him. Sure, he might disappoint me and I might be grieved at decisions he makes but he is still mine and that is enough.
I know that your mom is still entrenched in that organization but you might be her only opportunity to get out. The fact that she called even though you are D'aed might mean she is not letting the Watchtower completely control her.
Express to her your love for her and even if she doesn't respond at least you've done all that you could to keep a relationship with her. Maybe eventually she will come around. You seem like a really great guy and she will be able to see though all the superficial stuff and see what is behind all the tatoos, earings and contacts.
Loruhamah