HDFC Bank — Unauthorised/Unidentified transaction

Hdfc bank has put a hold on my funds of rupees 1174.86 as mi revenue hold through gefu,
The customer service is not reachable at anypoint in time.

First of all it's hard to reach customer service because it takes a alot of time and the ivr options are very difficult and tricky to navigate, after all the effort the customer service is not helpful

Emailing support.hdfcbank.com is of no use as well. No response other than system generated acknowledgement.

Please reinstate my money ASAP.