Dena Bank — bhim app transaction

Dear sir/madam,
I tried transferring rupees 8200 to my friend using bhim app, it was a case of emergency my friend to whom i sent the money was in a difficult situation.
I was trying bhim app for the first time and was happy to see a "sent" message on the screen. I thought amount is transferred and was waiting for my friend's call but even after half an hour when i asked him to confirm whether he got the money or not, it was really a bad thing for me that he did not get amount in his account and money was debited from my account.
It was 11th of august and till then even today i am regularly calling customer care ([protected]) and mailed the matter to bank but no body is responding.
Really it is a horrible thing when your money is debited and not credited to your loved one's account. Both o[censored]s are unable to use that amount, even in this difficult situation.
Please help me in getting my money back
Transaction id :[protected]
Date : 11/08/2017
Time : 17:12
E-mail id : [protected]@gmail.com