Bajaj Finance — Unnecessary deduction of money from my SBI account

There is an unnecessary deduction of money been taking place from my SBI bank account showing as CMP MANDATE BY BAJAJ FINANCE LTD, without any legal terms and definately without my knowledge. I don't have any dews with Bajaj finance Ltd, this is a very swindling act that needs an explanation with the an obvious refunding of amount that has been deduced till now. This cannot be tolerated I need action against it.