Verizon review: monthly rate

I have been a customer of VzW since January of 2013. VzW offers a 1/2-rate discount for Verizon retirees. What's required is a W-2 or pension statement from the company. I retired in 2003 after 30 years service; at the time our union contract offered us a "cash-out" option to take our entire accrued pension in a lump sum and forego a monthly pension distribution. I have contested this with VzW to no satisfaction. They refuse to accept my medical benefits card that states "Verizon Retiree", claiming this violates HIPPA regulations. Other than a worthless letter from my director (at the time) acknowledging my years of service, I have no other proof except for pay stubs dating back to 1972. This is flat-out ridiculous. Everyone who could vouch for my employment up to 2003 has since retired or is deceased. What am I to do to receive this earned discount?