If it were easy, everyone would be doing it. That's the best advice I can give anyone. There's always a quick way to get results but achieving long term results takes time. Increasing Facebook likes is achievable. Follow the examples laid out in the infographic below, and you will get more likes, more engagement and ultimately more followers.
If your company is not on Facebook, then you need to get it live ASAP. Make sure you create a Fan Page and not a profile page.