Likes Restriction on Instagram?

[XAngelX]

Okay, so I've been using this app called PopU and its a Like4Like app, and well its an app where you like people's pictures and you earn coins and use those coins to get likes and spend how much likes you want on your pictures by real people. And I just use this app to boost my likes thats all. Almost all my pictures have 60-90 likes, those that have 90+ I want them to reach 100 at least. So now Instagram wants to be an ass and now ALL my photos have "restrictions" and some that I didn't even paid coins to get likes for. So for an example I tried, I disliked one of my photos then re-liked it and then it dislikes automatically... WHY? I asked my friend to do the same thing it does the same thing. Now the PopU app tells me "Oops it seems like Instagram has restricted this photo. Please Try Again Later" It told me this TODAY but this has been yesterday when I was getting likes. Why is this happening? To my photos only?? I thought Instagram was suppose to be fun and all. People like getting likes. Its stupid to put a restriction on my pictures to get likes. -_- Anyway, How can I fix this??