Groupon India / Nearbuy — pizza coupons which was given for different locations

Address: New Delhi, Delhi

I purchased Pizza coupons for official team event costing 6000 from near buy. I double checked whether coupons are redeemed at locations near to my office. The info was such that its redeemed at 25 outlets but after purchasing the coupons, its mentioned use these coupons only at so n so outlets ( they were hardly 5 outlets )

Also Second time I purchased coupon for different set. This time location was automatically set into New delhi ( Inspite of my profile location ) and voucher issue which needs to be redeemed at Delhi. Now customer care not picking the call. I want to cancel these coupons and want refund.