HDFC Bank — Credit card money not refund

Address:

Thane, Maharashtra, 400607

On 17th Oct 2016 i withdraw 900 rupees from dns bank ATM in manpada (Thane). Money was deducted from my credit card but i didn't received the money from the bank. I launched a complain and got the complaint number[protected]. i was told that i will get refund by 7 working days. After 7 days when not getting refund i again launched a complain and got complaint number [protected]. Today is 28th Oct 2016 and till now i have not received my credit card refund. I request to kindly refund the money as soon as possible.