Terrible service received from online shopping

I placed an order at Makro on 25 April 2023 and made sure everything I ordered had a delivery date of 2-5 working days. These items were ordered as part of a feeding scheme who will be doing a toiletry drive to an Old Age Home. I received 2 sms' stating the order has been delayed with no excuse why. I've emailed Makro twice and called them twice. During the second call I was advised that some items were out of stock. This did not reflect on the Makro App so I requested that the items in stock be delivered and the balance be reimbursed to me. I have not received any notification of what they will be doing. It's like no one knows what's going on. You can escalate but then you need to advise your client if you don't want to lose the business. I am appalled at the level of service I have been receiving and that's why I am venting on this platform. I am so disappointed and don't think I'll be ordering online again. It's supposed to be a convenience to consumers but has turned into a nightmare.