A lot of time it happens though the code has been added from social plugins correctly , the buttons didn’t show up in the website.
This can be fixed if you take care of certain things. If you don’t know how to add Facebook buttons please look into this article where i have described about the whole process.
2. Don’t try to modify the code at any cost ,keep the code as it.
3. You can insert div tags to insert line break between the buttons.
4. Check for other Facebook page plugins you are using in WordPress sites. There are chances of the plugins to collide with one another. So deactivate other Facebook page plugins and check whether the buttons are working fine.
After you have checked with the points the social plugins Will work fine in your website. If any problem occur you can comment in the comments section.