Change delivery date on an order placed

I have placed an order on 17/12/22 online and selected the free delivery option of 3-5 working days and made the payment when I received my order number the delivery date was changed to the 28th instead of the 23rd. I won't be in Cape Town on that date and I was told that it cannot be changed these are my children Christmas clothes, what am l suppose to tell them? I have another order from Woolworths that will be arriving on the 22nd which I placed on the 17th, I have asked if they can delivery both orders the same date unfortunately they can't. I'm very disappointed with Woolworths had I have known the delivery date I wouldn't have placed the order online. Can someone assist me with this? My children will be very sad on Christmas day.