Canara Bank — Slabwise nmmb charges in relation to the cut

Sir,
My saving bank account in Canara bank etawah. My account no. Is[[protected]]name - shshank yadav in my saving bank account balance deduct incessantly from 01/12/2021 due to slab wise nmmb charges. But this charge applies when my balance less than rs.500 as say in Canara branch staffs.
So pls if wrong charges deducted by system, pls refund my balance in my account as earliest.
Inform my email.- [[protected]@gmail.com]@gmail.com