Reliance Trends — not proceeding for purchase if coupon code is used.

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Mumbai City, Maharashtra, 400052

What a pathetic site was that. Why do reliance trends give stupid coupons when its not working.
I tried for almost a month to purchase a product, but when i apply coupon code, the site don't proceed me to purchase. Rather the site hangs then and there.
Yesterday the validity of coupon is done. I need the product with the same coupon discount. The coupon code is cso1000. It has the validity of 13th june, 2018. It applies on the minimum purchase of 2500 rs.