State Bank Of India [SBI] — unwanted debits to my home loan account

Address: Kolkata, West Bengal, 700107

Website: SBI

On my loan account [protected] an amount of 26936.00 debited with desc as debit adjustment
Sbi general insurance on 17th jul'17 without any consent from my side. I treat it as a unwanted transaction, as no information has been given to me and no approval has been given from my side. When i am calling to the racpc of sbi, they are telling this one is mandatory but it has not been mentioned at the time of providing the home loan. I am currently outside of india and not able to go to the bank personally. Please help me so that transaction can be refunded.

I can be contacted by my email - [protected]@gmail.com