Allahabad Bank — refund not yet credited

Address:

Hyderabad, Andhra Pradesh, 500032

Refund transaction for my account has been successfully initiated on 22-aug-2018 with arn number 74056638235823443390601. It's been more than 3 weeks but the amount is not credited yet. It is initiated though payu with payu id [protected]
I want my refund. I am unable to get any information regarding that. Please fix it as soon as possible. Still there is no i. Formation on that.