Canara Bank — unauthorised deduction

Address:

Kamrup Metropolitan, Assam, 782004

I am holding a saving account no.[protected] in your canara bank guwahati, bashista chariali branch, 1st floor, hemlata merket since 2013. I availed a car loan (0mni) from your bank and have been regularly repaying monthly till date.
I wish to bring to your notice that an amount of 7425.64 rupees has been debited from my account month of aug 2017 without my knowledge. The transaction came to light when i received a sms in my mobile.
I immediataly contacted the branch manager and submited an application to enquire about the matter who replied that the amount had been deducted towards annual insurence premium.
Amused at this development i told the branch manager that my vehicle is already inneed under maruti insurence vide policy no -[protected] dt. 7aug.2017. So another insurence is not at all desired.
The branch manager thereafter assured me that the money would be refunded in a couple of days.
Now, that 5 month have elapsed i am yet to get the refund. Kindly arrange to get me back my refund at the earliest else i shall be compelled to take legal action.
Yours faithfully

Uttam kumar das.
A/c no.[protected]