Dena Bank — online banking : amount deducted for neft but credited to party

Address:

400086

Transferred rs 30000/- on 7th oct to my supplier.
My supplier not received amount but it is being debited to my account
I want to branch where my account is but they said that you transferred online hence we can not help you do online complait
I registered online complaint but even after 15 days no body responded to my complaint
I also called customer care they told me to send email at [protected]@denabank.com
I done this also even after 10 days passed and after 2-3 reminder also no body till date responded. Help me what to do.