Flipkart — stolen money without permission from card

Address:

Ahmedabad, Gujarat, 380052

As i got my credit card bill of jan’19 there was rs.4813 debit without my permission on 8th jan. I call bank and confirm that was taken by flipkart so i wrote mail 3 times but no response from there side even there phone number is not showing in my app. Still today I haven’t got my money or answer.