I had bought a life insurance policy from Bajaj Allianz Life Insurance and the premium mode is monthly ECS. The ECS date for the LI Premium is 4th of every month, but from last two months it is debited from my account on 2nd. I had received this notification two days back and it says that "they may take money from account four to five days in advance".
1- Can they do this?

2- How to change this?