ICICI Bank  -  unauthorized charges on my debit card without my permission

This is to draw your attention that my ICICI debit card [[protected]] has been unauthorizedly charged by Microsoft for inr 6252.82. Transaction ID is O/[protected]/[protected]
My pin is secure with me and I have not entered any details for any transaction as per my knowledge. Please undo this transaction as it is ilegal as per RBI guidelines in India to charge a debit card without authentication such as pin or OTP from the owner. Please refund or charge back the amount deducted.