There aren't any promotions that allow the 6s plus to be free. Even with a 2 year contract. It sounds like you may have misunderstood somewhere along the lines. Or a rep may have miscommunicated something.
If you want to talk to someone, you need to all 800-922-0204. This is for community members. Even if Verizon answers sometimes, this is not meant as a place to request a call back. We can try and help you but if you want to talk to Verizon, call them.