Android Mediation integration with inmobi , mopub

i have integrated Admob Mediation as below

mInterstitialAd = new InterstitialAd(this);
		mInterstitialAd.setAdUnitId(getString(R.string.ad_unit_id));
mInterstitialAd.setAdListener(mAdListener);

InMobiAdapterExtras inMobiExtras = new InMobiAdapterExtras();
MoPubExtras moPubExtras = new MoPubExtras();
AdRequest adRequest = new AdRequest.Builder()
	.addNetworkExtras(moPubExtras)
	.addNetworkExtras(inMobiExtras)
	.build();

mInterstitialAd.loadAd(adRequest);

it shows ads live (app is in store now) since a month but doesn't showing any impression count am I doing any thing wrong with this code

There is a problem with mediation api problem remain same after getting response from mediation team

I have ended up using separate integration of inmobi and mopub without mediation rather then wasting hours in checking response from mediation team.