Indian Overseas Bank — incorrect auto debit

Address:

Pondicherry, Puducherry, 605009

Hi,

I could see that the amount of 12k and 7k unathorised debit from my savings account during february and march. I haven't received any sms relating to this balance out transaction. When i checkd by entering passbook it shows as "self".

Kindly assist me how can i get the refund if it is incorrect debit.

Regards
Niraja ravisastrigal