Flipkart — Cheated by customer care. I want my refund which I lost because of customer care representative

I ordered 2 teddy bear woth Rs 299 each. While ordering the show that my location is deliverable. But while delivery they update that they cant deliver my parcel because of the pincode is out of service area. So i called customer care(14/03/2022) for help they told me to change my pincode and address but this was not possible to me because of another pincode was 15-20km away from me. So i asked for another solution he told to to cancel the order. I ask him that if i cancel the order then will i have to pay 50 rs for cancellation as mention in policy. He tond me that you will gel full refund without any cancellation charge because of that was flipkart fault. He told me 249 rs will deposit in 24 hours and 50 rs deposit in some days. So i received 249 rs refurd and didn't receive 50 rs so i called today(21/03/2022) customer care to complaint but they told me that was their policy to charge me that amout and they can't refund me that amount. I just did what he said and now they are ponting on me. Even i tried to call them 5 time everytime they hear my complaint and cut call directly without giving any satisfactory answer . I want my refund 100rs which charged because of that customer care representative. It was all flipkarts fault not mine.