Canara Bank — Amount debited but didn't received from ATM Machine

Address:

Delhi

I was using Canara bank's atm located at Janakpuri D Block branch on 26th January at between 06:00-07:00 pm to withdraw rs. 500 from my mother's account. I received message twice on my mother's mobile that rs. 500 has been withdrawn. This means total of rs.1000 is debited.
in reality, i had not received any cash in my hand. Then I went to Nangal Raya Canara Bank ATM and withdrew Rs.500.

I didn't have the transaction declined slip with me, but you can check it under bank details.

I haven't received that previous Rs.1000 (500+500) in my mother's account yet. Request you to look into this and do the needful as soon as possible.

Mother's Bank details are as follows:
Bank Name & Branch: Canara Bank, Nanga Raya Branch (Formarly Syndicate Bank)
A/C no : [protected]
IFSC : CNRB0019019
MICR Code :[protected]