Paytmmall — order returned but not refunded

Address:

Kolkata, West Bengal, 700036

I am gourab majumdar. Paytm customers. I have ordered 3 windows curtains which is returned after delivery due to problems with that product. Courier was picked up my products dated[protected]. All three products are returned. But from the 3 products i get refund two on the same day. But one products refund still pending till now. I called assistance too many times. As per their ph call i give them my email id and send them courier recept as a screen shot. But still my problem is not resolved from them. My order i'd at paytm mall is [protected].
Please take legal action about this problem and harassment of refund case.