Poor service!

I made an online order on the 27th August 2024 and the estimated delivery period was between 4-6 working days. Today the 4th September it's the 6th working day aswell as on the app it shows my order is due today 4th September. This afternoon I done a follow up as I really need the Items by tomorrow and I was advised via the WhatsApp portal that there was a delay even though it's been shipped on the 28th August already. At that moment I felt Mr price had let me down because if I did not enquire then nobody would've called or emailed me to update me with the delay. I enquired about getting a refund as I really need the items by tomorrow for my kids and if theres a delay it will mean I need to buy other clothes and I was told I cannot get a refund now. I feel this is ridiculous as I PAID for the items already that I do not have in my position. Mr price was quick to take my money but fail to deliver on time and I now need to buy my kids other clothes. The response I received on WhatsApp was "I am resolving this conversation for now. Please do reach out to us if you have more queries. We’re always happy to help you. Have a great day🙂" however nothing was resolved I am extremely disappointed not mentioned disgusted by the service.