Defective and no customer service received

I ordered multiple items including milk. On boiling it, the milk curdled, clearly making it unfit for consumption. This has now happened THREE times. Every time I request a replacement, I'm told the product is out of stock, leaving me with no option but to accept a refund. Now, if I simply want to reorder the milk, I'm expected to pay an additional ₹72 in handling and delivery charges for a product that was defective in the first place! When I requested a waiver, I was told there was no such option. Managers supposedly take 3–4 hours to call back, while Shazia and Anand abruptly disconnected my calls. Why should a customer bear additional costs for Blinkit's failure to deliver a quality product? Three incidents, no replacement, no accountability and absolutely pathetic customer support. I was transfered to 4 different executives and none of them helped me my call was abruptly disconnected and one executive even accused me of disconnecting the call.