Sharekhan — Cash balance deducted

Hello,
I transferred 4000 inr in my equity account today
I placed order for ongc shares of 30 shares at 78.40
And again sold them all at 78
Now my balance should show less 12 inr only and i also received message saying equity bill 14.64 so my balance should be 3985
But it's 3535 inr now
It's happened previously also i can't see where they deducted so much i am small investor and such hidden charges really discourage me to do any investments.