u/Hot-Yoghurt4741

Location: Tennessee

I was looking to switch to another wifi company and saw a sign for 75 days free I called and asked about that promotion; they said that promotion ended April 1st and they went onto a new one and would not honor that one. How do I go about false advertisement? It's even on a digital billboard, I saw it yesterday and I took a picture of their building advertising and when brought up it was "yeah we just haven't changed it".