State Bank Of India [SBI] — unauthorized deduction of money from sbi bank account - request for refund

Address:	TK layout, Mysore, Karnataka, 57009
Website:	Freecharge

This is regarding an unauthorized transaction made with my mother's debit card of inr 9999 twice. She never use card online and never share card details to anybody.. Please give me a solution. She had compliant to her bank but they did not give any satisfaction answer so i request please provide me a solution.
The narration in bank online statement says by debit card othpg[protected]freecharge mumbai in one transaction and in another by debit card othpg[protected]freecharge mumbai. Kindly process this issue and give us a satisfaction solution. Waiting for your reply. Kindly refund my mother's amount.
This transaction happened on 28/03/2019. We came to know in april 1st week when she checked online summary. She did not get any message about this transaction.