Burger King — UPI Payment successful but payment window was timed out and no refund yet

Address:

407, Chakrata Road Dehradun 248003 UT India

I placed an order at Burger king outlet in Chakrata road, Dehradun on 22 Oct, 2022. time-15:29 for Rps- 714.00
I paid using google pay UPI but the payment window in their billing machine was timed out even though the payment was successful 30 seconds before the timeout.
They showed me batch history and my payment wasn't there and i was told i will get a refund in 3 days. So I payed using again using upi to the outlet manager.
Its been 17 days and I haven't received a refund yet.
I talked to the manager several times but no luck.
I would like a refund as soon as possible.