Reliance Trends — did not refund money

Address:

plot no-2190/2460/297/5/5657 mouza matha sahi bhadrak, Bhadrak, Odisha, 756100

Dear sir
I did shopping from reliance trends bhadrak plot no-2190/
2460/297/5/5657 mouza matha sahi... Contact no.[protected]
When i exchanged.. I didnot get proper discount... But after arguments nd little hard work i go that... But in new billing 21 rupees was to be refunded to me... They didnot refund... Due to 1 hr of exchanging periods i was not in that much concentration..21 rupees does not matter.. But due to this of service m so irritated...
Mobile no-[protected]