HDFC Bank — refunding of an amount for paid

I payed an amount of 2499 rupees for purchasing an mobilephone via net banking.
Advertise of an mobile via a link appeard in my mobile from flipcart sale and i followed and paid said amount but there was not any order no.
Only amount 2499 deducted on 30/09/2019.
Please refund my money my
A/c no [protected]
Deductio detail - ref. No is[protected]
Narration is[protected]paytmwalletloading
My contact no is [protected]