Bajaj Finserv — around 28000 rupees deducted from sbi account linked to bajaj finserv

We have 94 entries of 295Rs Deduction from my moms account saying "Chrg Recvd-mandate fail txn dt.*Dates mentioned in this area* TRANSFER TO INVESTMENT INTERMEDIAR.

I want to know how any one can deduct around 28000 rupees from our account without our knowledge?

and what are these charges for?

why we need to pay 295RS 94 times.

I need my refund or a proper explanation, 28000 rupees is not a joke