Instagram doesn't approve my app with some partly irrelevant feedback - api

Question

I have written an app which notifies users when someone make them unfollow (As like as any other apps in this area). Then, I got my app approved by Instagram. After six/seven attempts, they don't approve the app till now. I followed their instructions as feedback and fixed any probable privacy problem which my app might have. But I didn't get any bright answer from them as far.
I throw my app on the following use case:
My product helps brands and advertisers understand, manage their
audience and media rights.
And I wrote my API use cases as follows:
Thank you for considering our request to approve our application. The
required information for enabling live mode for our application is
explained in the following lines:
Q1: How your app does use the Instagram API?
First of all, our user (i.e. brands or advertisers) selects the “Unfollow Finder Service” on our application.
We redirect the user to Instagram login page, as indicated in API documentation, to authorize his account to accessing required scopes.
i. Note that we already told the user everything that we are going to
use.
We tend to call follow APIs whenever the authorized user clicks a button in our application.
Ultimately, we inform the authorized user with the information obtained from step 3.
Q2: How does it fall into one of the approved use cases?
The list of users who recently unfollowed/followed an
Instagram account are definitely crucial and beneficial for the brands
and advertisers on Instagram. In this way, they can get feedback
implicitly from their customers. Our service help them to manage their
audiences and provide better content for them. So, according to Q1,
our use case falls into “My product helps brands and advertisers
understand, manage their audience and media rights.” We never violate
the approved scopes and Instagram's privacy.
Q3: Who will be using your app?
In our region, lots of brands and businesses utilize
Instagram to publish their content. They are the users of our service
and can use it to improve their relation with their audiences. Kind
regards,
As you see, I'm trying to tell them everything in detail. But in my last submission, they declined me with the following feedback:
General issues:
Policy Violation ("Like", "Follow", "Comment" Exchange Program): Your
app shouldn't participate, enable or promote any “like”, “share”,
“comment” or “follower” exchange programs. In working to build a high
quality platform experience, we ask that you comply with our Platform
Policy (http://wwww.instagram.com/about/legal/terms/api/).
I just want permission on follower_list scope from them. The surprising part is that they noted me with almost irrelevant feedback. It seems that they do not want to approve my app at all.
Do I violate their privacy?
Does anyone face this problem? How can I fix it and had my app approved?
Sorry for asking this question here since I almost googled entire web (+Stackoverflow) and find no helpful answer. All of my previous attempts were gone away.
Thanks in advance.