Flipkart - Not return back change

Delivery person not returned balance amount, while I paid delivery amount in COD. He told he sended money in G pay butnot recevied yet. I already rsised complaint but response is also i didnt get back till now. This is really unethical. I want know what action taken by flipkat. See iam in office so i informed him to give deliver to my home after he got money he told he dont change so i told to pay in g pay. He told he send money and shown some msg went away. But i didnt get money back. I called him he is not responding, i complaint in flipkaryt customet service. He told he look on it and you will receive email shortly he informed but that also i dudnt get any response from flipkart customer service also. untill unless i wont get proper response i wont leave this matter as it is.i accept every time ever one had change in their hand. He told he sended money, if he sended money then where it goes. E kart delivery person land line no