Paytm — cash back for product return did not received

Address:

Mumbai City, Maharashtra

I ordered Zebronics SW275 RUF 2.1 Multimedia Speaker (ORDER NO.[protected] from paytm but when i received the product it was damage and not working properly. Then I requested for return of product, product has been returned but its approx one month the did not returned my cash I mailed them many times but they always say to mail them the scan copy of reverse pick I mailed then three times but still the did not returned my cash till date.