Poor customer service - delayed delivery and false promises

I place an order for Click and Collect on 29 June. My order was supposed to arrive on 8 July. I have since called three times and I keep getting told it's the next day. I was now on a call again and hung up after being on hold for 13 minutes. As a resolution, I would like the item delivered to me at no extra cost given the inconvenience of having to follow up constantly. The app doesn't update so one is forced to call the call centre and then be given false promises or put on hold incessantly. The other option is chatting to them on WhatsApp and often abandoning the chat due to a delayed response. Why offer services that you can't afford to offer???