HDFC Bank — credit card refund

Name:Ajit Singh
Credit Card No:[protected]
While Booking Train Ticket on date:08/11/018 from IRCTC Website, i made payment through HDFC Credit Card. But Amount(1838.68 rs.) deducted and ticket was not booked.So i waited for 10 to 15 days for refund but debited amount not refunded. Then i called to HDFC customer Care, they told me that it takes more to get refund. Again i waited for refund but amount not reflected in my credit card. so after these i called again regarding the same then they told me to file dispute form.I filled CDF on 21/11/18 and mailed to [protected]@hdfcbank.com.I called again on 26/11/18 to HDFC Customer Care then they told me that now it will take 90 days to process. While Filling CDF they did not tell me about Dispute process time and all.Now i need help from you to resolve my issue asap and help me out to get refund from HDFC Bank