Realme India — Regarding refund

Website:

www.realme.com/in

Respected sir/ma'am,
I devansh shukla make an order on 9th may on the official site of realme.
I ordered realme 5s amt.: ₹11, 999
But due to some issues i cancelled that phone on 15th may. After 10 days when i didn't receive any refund i called them but no one answered the call and then i contact through their chat service which is available on there official site. Now from past 7 days they are saying wait for sometime and making lots of excuses. When i request to provide seller's contact no. They refused by giving an excuse that they can't share it. Sir it about 17 days but i didn't received any refund yet. Please help me for getting my refund.
Order no.:[protected]
Name:devansh shukla
Email:[protected]@gmail.com
Phone:[protected]
Ordered on:9 may 2020
Cancelled on:15 may 2020
Payment mode:pre-paid

Here are the details sir which they ask every time.
Please help me out from this problem.

Thank you