Shop CJ Network — refund issues

I placed an order of worth rupees 1150 on shopcj and i received faulty and bad product then i returned that product and i asked for refund they provided me the shopcj shopping voucher worth rupees 999 then i asked for refund they said they will give voucher but i said i want my refund then they said ok and you will get your refund 999 rupees in your account but i paid 1150 and they are telling that i will get only 999 which is unacceptable.. I called more than 10 times but no reply. Please help in this to get my refund asap