Flipkart — My order got cancelled after 10 days of placing my order

Website: Flipkart

I ordered Samsung Tab S9 FE plus on 24th October 2024 and my delivery
date was 4th Nov 2024. I was eagerly waiting for the but my order
didn't ship till the date of delivery and my order got cancelled by seller on
th Nov 2024. As I had placed order at a discounted price during Diwali
sale and now the price has increased. When I talked to customer care they
old me that the seller got out of stock for this order after I placed my
order. If seller didn't have enough stock then why they accepted more
orders than availabe stock. If there was shortage they could cancel my
order when I placed my order but they cancelled it after 10 days of placing order. I kept waiting for my order and when it got cancelled after waiting so long I went through tremendous trauma. I want Flipkart to be held accountable and I want new product at that discounted price or pay the penalty for this harassment