How to get more likes in instagram? (Abu Dhabi)

I have shop in instagram, but I have small activity on my page. I want every my post have so much likes that this post will have to top. So I tried many free ways to do it and I won't reach it. Now I am thinking to buy some likes on my post, maybe it will increase activity. I am thinking to buy instagram likes from Protected content . How do you think can I believe this site or not? I am little nervous before it. Thank you