State Bank Of India [SBI] — money debited from account unauthorized

A fraudulent transaction was tried in my account on 10th june 2018 from 21:09 to 21:17.
I got 6 messages continuously stating that "dear customer, your transaction at pos [protected] has been declined due to insufficient fund in your account" and 141.6 rupees got debited from my account (Luckily i had only 218 rupees in my account) and i am not able to see them in my mini statement. I have immediately blocked one of my two debit cards (Ending with 1649) but i am worried to use my account again as the fraud may happen and i will lose my money. I have raised a complaint on this in sbi customer care with id:[protected] but got a response stating it is as per bank terms and conditions charges are debited but they failed to answer the questions why did they charge when i did not even try the transaction? Such awkard response. Please take necessary action from your end also please return the amount debited from my account.