HDFC Bank — amount deducted but transaction not completed

Amount debited from my account but transaction due network slowness issue while transferring the amount to another account via payzapp. amount not credited to other account still deducted from my account. dropped a mail to mail id provided in the app but no further updates afterwards even after 8 days of incident . pl look into the matter ASAP.

Date of incident : 01/11/2017
Account num : [protected]
Ifsc : HDFC0001756