HDFC Bank — imps transaction - money is debited but not credited to beneficiary account

On 12 oct, i have made imps transaction to my friend with full trust on hdfc bank, money is debited at that moment only but not credited to beneficiary account till date. Also, no corresspondence is made regarding the same at any level by any executive of bank. I am highly bothered about the amount as it is of high value.
Please resolve the problem as soon as possible.