ICICI Bank — Debit card charged twice for a transaction

Address:

Thiruvananthapuram, Kerala, 695583

Dear ICICI,

For a transaction at a local hyper market on May 21st - 2017, my debit card was charged twice. I dint receive the return yet.Attaching the bill and the transaction details.
ACCOUNT NUM :[protected]

When I made the payment for the first time, due to some connectivity issues
it didn't go thorough and had to swipe my card for the second time. The return was supposed to get credited within a week but now its been more than a month.

Kindly help on this !!