Flipkart — Delayed delivery for order no OD[protected]

Flipkart order no. OD[protected]

I ordered Springtek Amaze Eco 4 inch Queen High Density (HD) Foam Mattress amounting rs 4844 on 9th aug 21. Delivery date was 20th aug 21. Then on delivery day they postponed it to 28th aug 21 and now on 28th aug they again postponed it to 6th sept 21. I want to cancel the item and but flipkart is denying by saying product does not fall under cancaleable category. I am mentally annoyed with such behavior from flipkart when i am in dire need of the required item.

Flipkart should compensate for the mental agony they have created.