Tata Motors — Regarding non-return of deposited amount

Address:

Sasaram , Rohtas Bihar

My father had booked a car but he passed away a few days later, so I applied to the GM of the showroom demanding a refund of the deposited amount along with all the original receipts.
They had said that the money will be returned in 1 to 2 days but today it has been almost one and a half month but my money is not being returned to me and the original documents submitted by me have also been lost and now they are saying that You take an oath from the court that the receipt has been lost and I will not claim it again in future, but sir, it is their fault, they have lost the papers, so why should I do all this.

I have already complained to your company but there is no hearing.