Verizon Verizon Fios Verizon Fios Not honoring promotion after confirmation Nationwide

I received a letter from Arturo Picicci - Director, Customer Relationship Marketing at Verizon regarding locking in for a 2 year contract for Verizon Fios. My 2-year contract was expiring and the letter said if I replied now I would receive Early Bird Savings of $15/month for 2 years off my regular bundle rate of $119.99. I received an order confirmation from Verizon twice for the $104.99 rate. However, they will now not honor the rate and offered a $109.99/month rate because they never processed the $104.99 rate. They offered some smaller discounts on the phone, but not what they originally confirmed twice in writing back to me. Not sure if this is legal.