Bank Of Baroda — dedicated amount without prior notice and not even mentioned why it is deducted

Address: Hyderabad, Andhra Pradesh, 500018

Today when checked my balance in bank of baroda app i came to know that a balance of 868 rupees has been deducted. I don't know why they have deducted even though i didn't made any transaction today and i don't even get message of this transaction. How can you deduct customers money without any prior notice and not even informing after the deduction also.
Please revert back my money asap