Amount debited from electronic cash ledger but not credited

Hello,

Amount was debited from Electronic Cash Ledger while trying to offset GSTR-3B Tax Liability but the same is not reflected in (is not credited to) the GSTR3B Apr-18 "Payment of tax" Table. 

I posted a grevince on GST Grevience redressal portal but every time the reply is same " You can check the CPIN status from Track Payment Status service available on the GST portal."

Is there a higher authority to contact if the issue is not addressed on GST Grevience redressal portal?

Thanks.