ICICI Bank — i am complaining about unnecessary deducting rs.999 from my icici savings account

I am writing this complaint because there was unnecessary deduction of RS.999 from my ICICI savings account on[protected] naming under VSI/AMAZON STAN. But I didn't purchase any of the product or service regarding to this, So please let me know what is the reason behind this as this is some kind of illegal practice and this should not happen to anyone else in future and please I request you to help me get my money back. Please take it seriously and take a quick action against this practice as it's a huge amount