I have the same phone and have not received the Pie update either (as of EOD February 13, 2019). Someone I know (in real life) has a Verizon version and got the update a week or so ago
It is frustrating.
People lie. I'm sure you could find people who claim to have gotten the update in 2014.
This will be my last Samsung phone. Becasue of slow updates (mainly security updates, but also OS updates). Because of the garbage apps I can't remove, and some of which I can't even disable.
My LAST Samsung. Believe that.