Delivery date not held up to

I am beyond frustrated to even be writing this. I normally use the online service without any issues. This time was a lot different, probably will never use the service over festive again! I placed an order on the 17th,expected time of arrival stated the 23rd on the app. My order was shipped the 19th. Today is the 24th and my final interaction with the online support team resulted in "Please be advised that couriers are Monday to Friday and they will be no deliveries today as they are closed for the holidays our sincere apologies for the inconvenience caused."... This is after last night I was advised to please check in with the online service in the morning should I not receive any confirmation of delivery... It's a day before Christmas, my entire purchase obviously was for Christmas. I have been following up with this order since Tuesday 20th and was assured it would be delivered by the 23rd. I'm pretty sure an express fee would ensure that standard delivery time would've been met. The online service might as well be run by a bot honestly, there really is no human connection or going beyond. Processes surely are in place to later change delivery to express or cancel purchases surely, no other alternatives were explored but rather the general solutions provided. I'm disgusted honestly to say at the least.