Over promise and Under delivering Takelot!

I made & paid for an order on the 28th October and saw that it would be delivered on Monday the 30th (which is the reason I proceeded with it because I needed the item on Monday) now when I'm requesting for a cancellation they tell me to wait for an sms or a delivery to be done which they also don't know when but the system has a date that has passed, which was 30th October 2023