Magicpin — paid for 4 amazon vouchers but received only one

Website:

Magicpin.in

I ordered 4 vouchers each 100 rupees. But i received only one. I have paid 400 but still they have sent me only one voucher.
Please look into the matter. Moreover they don't have proper customer care. There is no contact number or email service to complain. Please look into the matter and solve it at the earliest and take some necessary actions whatever required