State Bank Of India [SBI] — 57.50 was deducted from account (twice)

Address:	500016
Website:	retail.onlinesbi.com/nretail/login.htm

Suddenly on the 2 jan 2018 i have received two sms stating that rs.57.50 has been deducted. I have logged into my account and verified that due to some reason there where two transactions with amount 57.50 (57.50+57.50=115) with description/narration as:

1st transaction narration is: debit
Mandate citi sbin[protected] 02-jul-2016

2nd transaction narration is: debit
Mandate hdfc sbin[protected] 22-jun-2016

I have contacted the customer support a raised a ticket# [protected].
https://cms.onlinesbi.com/CMS/Status.jsp

Below is the explanation that i have received

Complaint status/resolution : charges rs 57 for sorry for inconvicence, p recovered correctly as per exiting terms and conditions. The details of service charges are available in our official website under service charges and fees link.

I have no clue what are these charges related to when i tried inquiring they asked me to visit the branch. My branch is hyderabad public school, hyderabad, telangana.