Union Bank Of India — IPO Lien Amount Not refunded

I had applied for IPO of Ami Organics for 1 lot amounting to Rs. 14640 and the same amount was blocked. However, I didn't receive the allotment. It has been over a month and the money is still not refunded. Kindly release the lien in my account at the earliest.

Recently customer care contacted me but did not initiate the refund process.