PharmEasy — want refund and order not delivered

Address:

Indo global group of colleges abhipur Mohali, Chandigarh, Punjab, 140109

I had ordered a medicine which costs around 325/- i pay the money online via paytm bank in the pharmeasy app. I ordered on 11 sep order number: m11766136. The order was to be delivered on 16 sep but the order was not delivered and marked as delivered and there is no message about delivery, no details of delivery boy. Now i am still waiting and complaining about this issue in pharmeasy customer care since 4-5 days daily. The call centre says "we are working on the issue please wait 24-48 hours and we will update you" and they are not providing any updates.
So i want my refund as soon as possible thankyou