IDBI Bank — ecs mandate charges from idbi bank

Since 3 months (March, april, may 2019) from my IDBI bank acno.[protected] has charged total amount of rs.1770 for just one missed emi of rs.2696/- for march, 2019 month. I have asked several times to know the reason and the required return/ecs mandate charges applicable for emi amount of rs.2696/- but no response from bank people
I have followed idbi bank several times to revert ecs mandate charges 3 months subsequently debited from my bank account unnecessarily for one missed ecs.

Please resolve the issue atleast from your end

1.02/mar/19- dirdb rtn chg 020319 bajaj fin - rs.5.90
2.07/mar/19- dirdb rtn chg 020319 bajaj fin - rs.8.00
3.25/mar/19- dirdb rtn chg 020319 bajaj fin - rs.18.00
4.29/mar/19- dirdb rtn chg 020319 bajaj fin - rs.500.00
5.03/apr/19- dirdb rtn chg 050319 bajaj fin - rs.194.93
6.03/apr/19- dirdb rtn chg 050319 bajaj fin - rs. 58.10
7.03/may/19- dirdb rtn chg 050319 bajaj fin - rs.395.07
8.03/may/19- dirdb rtn chg 140319 bajaj fin - rs.590.00
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Total - rs.1770
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