Facebook app review getting auto rejected for manages_pages feature - ruby-on-rails

Question

I had earlier been provided permission for the feature Manage_pages. However, Facebook has changed it policies and this feature has been depreciated, moreover, my application wasn't using much of the Facebook feature. For these 2 reasons, my app has been disabled.
SO, i submitted a review for the same. The feedback is as such:
The main purpose of my app is to take payments through the client's Facebook page , for which earlier used Manage_pages feature. Now, even if i hit the connect button, it says "The app is in dev mode" . Am stuck here, how can i get the button to work and display a screen cast if I keep getting the same error. this seems like an endless while loop :(
Now, when i am trying to re-submit an app review, it seems to be getting auto rejected.
Any insight would be appreciated!
Here is my Facebook controller code
class FacebookController < ApplicationController
skip_before_action :verify_authenticity_token
skip_before_action :authorize
def connect
# get array of facebook pages added
page_ids = params[:tabs_added].keys
# create or update connection for each facebook page added
page_ids.each do |page_id|
page = FacebookPage.where(page_id: page_id).first_or_initialize
page.update!(slug_id: params[:slug_id], form_type: params[:form_type])
end
head :created
end
def show
request = parse_signed_request(params[:signed_request]).try(:[], 'page')
facebook_page = FacebookPage.find_by(page_id: request.try(:[], 'id'))
facebook_admin = request.try(:[], 'admin')
if facebook_page
redirect_to contribution_form_url(
subdomain: facebook_page.account_type,
id: facebook_page.slug.name,
form_type: facebook_page.form_type,
iframe: true,
facebook: true,
facebook_admin: facebook_admin,
facebook_page: facebook_page
)
else
render nothing: true
end
end
def update
facebook_page = FacebookPage.find(params[:id])
slug = Slug.find_by!(name: page_params[:form_slug], account_type: facebook_page.account_type)
if facebook_page.update!(slug: slug, form_type: page_params[:form_type])
redirect_to contribution_form_url(
subdomain: facebook_page.account_type,
id: facebook_page.slug.name,
form_type: facebook_page.form_type,
iframe: true,
facebook: true,
facebook_admin: true,
facebook_page: facebook_page
)
end
end
private
def parse_signed_request(signed_request)
# We only care about the data after the '.'
payload = signed_request.split('.')[1]
# Facebook gives us a base64URL encoded string.
# Ruby only supports base64 out of the box, so we have to add padding to make it work
payload += '=' * (4 - payload.length.modulo(4))
decoded_json = Base64.decode64(payload)
JSON.parse(decoded_json)
end
def page_params
params.require(:facebook_page).permit(:form_type, :form_slug)
end
end
and i am also attaching the the script which opens the facebook tab
<script>
function move_to_top( value )
{
$(".fb_dialog").each(function(index) {
if($(this).css("top")!='-10000px') {
$(this).css("top", value + 'px' );
}
});
setTimeout( ('move_to_top("'+value+'");'), 1250);
}
window.addToFacebook = function() {
// make sure logged in as user; not page
FB.login(function(loginResponse) {
// if they are correctly logged in as user
if (loginResponse.authResponse) {
// popup modal to add form to page
FB.ui({
method: 'pagetab',
display: 'popup'
}, function(response) {
// if tabs were added, make the connection
if (Object.keys(response.tabs_added).length > 0) {
console.log("inside")
response.form_type = $('[name=form_type]:checked').val().slice(0,1);
response.slug_id = '<%= Slug.find_by(name: slug, account_type: candidate.account_type).try(:id) || candidate.account_slug.id %>';
$.post('/facebook/connect', response);
$.magnificPopup.open({
items: {
src: '<%=j render "form_settings/facebook_success" %>',
type: 'inline'
}
});
}
});
$(".fbProfileBrowserResult").ready( function(){
t = setTimeout ( ('move_to_top("'+50+'")'), 1250 );
});
}
});
};
</script>
<p><%= link_to 'Connect with Facebook', '#', onclick: 'addToFacebook()', class: 'button' %></p>