Bajaj Finance — Regarding Unauthorised transaction/ Regarding refund the amount

My EMI due date was 2nd November 2020. I was not knowing that as it was my first EMI. I have made the payment on 5th November 2020 along with the late payment charges. So totally I have paid 9032/-Rs(Including 450/- rs late payment charges).
But on 10th November they have again placed the ECS request and 9289/- rs got deducted from my account. I have mailed them and told them the matter. They asked me for the ban account statement. I have mailed them bank account statement as well.
But now, they are telling me that as per their policy they can refund only 8582/- rs which is my EMI amount.
So was it my mistake that they have placed the ECS request again?For reference I am attaching the screenshots.You can see both the transaction which is happened on 5th and 10th November 2020.