Street Style Store — Voucher doesn't work for the exchange

Address:	560017
Website:	streetstylestore.com

I had placed an order for 3 sandals under "3 for 999" category on April 22nd 2016. I received the products in around two weeks. I raised a return request for all the three products as they were of worst and cheap quality with improper size. The pick up was done for those 3. First of all I didnt get my credit note of Rs 999 for long time. After sending multiple emails to the helpdesk, they gave a credit note of Rs 999 and asked me to order another 3 products from the same "3 for 999" category.

Now when I try to order the 3 sandals from "3 for 999" category, the total comes as Rs 1498. So i need to apply my credit note of Rs999 along with the voucher SAVE498. But everytime I try to do so it gives error as:
"This voucher is not combinable with an other voucher already in your cart".

I have been sending multiple emails to their helpdesk from almost last 2 weeks, but they are not bothered to respond at all. There is no number to contact them on call also. My 999 rs are stuck with this unreliable website.
Highly disappointed with the service. I want my money back.

Why are they selling the products if they cant even address customers issues. They are simply fooling around here and robbing people of their money and then not responding back.

I see many complaints against this website on "https://www.consumercomplaints.in". Some seriously strict action should be taken against this website and they should be sued for cheating the customer.