This online company befooled people by delivering cheap quality product and don’t refund their money

I’m Ratnanila Das. I mistakenly ordered a wedding lahenga (code number 029) from www.vienna.com.But immediately after it i cancel this order (order number 23577).But I didn’t received any confirmation massage.On 25th March, 2018 Sunday this order number 23577 was delivered to my address and I have to pay the full payment of 855 rupees. Surprisingly the product was too cheap and totally different from the ordering one.Now when I try to contact with them I can’t. They don’t even response my massages. I want to refund my money .Please look in this matter and help me to get my money back.