Indigo Airlines — Power bank found in baggage but not returned by staff

I was travelling by flight no. 6e6187, DELHI-RAJKOT DT. 24 May 2023. My ticket no. By mistake power bank was kept in baggage and in scan it was found. Office staff called me to check luggage. I went in luggage ground with staff and found power bank. But ground staff told me that they could not return power bank as it will disposed. I argued with them I have four hours before departure and I will keep the power bank in my hand luggage and I am ready to re-scan my hand luggage. But ground staff and boarding staff did not agreed and did not return my power bank. I kindly request to refund my power bank or compensat for that.
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