SBI — deduction - seeking explanation

Sirs,
My account number is [protected] . Home branch SBI, Usilampatti.. Today there has been a deduction of amount 147 rupees from my account. It's a Savings Bank account and the balance is 373.42 (After the deduction). I want to know why this deduction was made. The message what I received is this : your a/c xxxxx023429 has a debit by transfer of Rs 147.50 on 22/04/2020 Avl bal Rs.373.42. I kindly request you to give me your explanation since it is your duty to answer to your customers.
Regards,
M. Keerthana
22/04/2020