Swiggy — refund regarding complaint

I ordered an Icecream on 25th of May 2019 the dilevary executive was really impolite and was not ready to dilvery it at my place so I cancelled the order. Swiggy promised me to initiate the refund but they haven't yet initiated refund in my account I have tried to contact them more then 6times they haven't still resolved my issue it's been more then 15days now I haven't got my money back