I had what sounds like the exact same problem and a similar experience with tech support. Starting about 3 weeks ago my wife could not call my phone from her phone. We could both text and I could call her and I could receive calls from anyone else. Spoke with level 2 support (or whatever they transferred me to after describing my problem to the first technician) on 3 different occasions. Each time they promised multiple times to call me back the next day and that they would personally see to it that it got resolved. Never got a call back from any of them. We spent several hours on the phone on these support calls. Also made 2 visits to the Verizon store to see if they could help.