Sorry but we can't deliver on our promise

My order no 56758 placed and paid on 7 February 2023 was advertised as delivery between 17th and 27th and now they state that there is no way they can do it in time. The tracking states that it left on 20th today is 24th but the tracking website gives no further details. They say there is nothing they can do. In my opinion it is a breach of contract if they offer delivery on 27 Feb, I paid for the order on that basis but now they fail to deliver on their undertaking.