The metal clips for iPhone do not go back in properly

Hello.

I faced a problem with my iPhone 5, where the battery was replaced. However, on the left side, the metal clips do not go back in properly. How do I fix this?

It seems like the metal clips are bent on that side, and a portion of the metal clips do not go into position and click down. This results in an opening, allowing for dust to get in. Is this bad for future use?

Thanks in advance.