Incomplete delivery of an order

I placed an order for three items which has been partially delivered. I am waiting three weeks now for the balance of my order. Only one out of three items were delivered. Despite my numerous calls and emails, I continue to receive the same response with no resolution or follow-up. I lodged a formal complaint via email and logged a support ticket, but each time I enquire, I am told that the matter has been “logged with the delivery company,” yet no one has contacted me, and I have received no progress updates.

Furthermore, I have been informed that my issue is being escalated with the relevant department to assist me, but to date, I have not received any callback or communication. This situation has persisted for three weeks now, and the lack of communication and accountability is highly frustrating and unacceptable for me as a customer. I am very unhappy, when asked to speak to a team leader or manager they are always not available and is told that my details will be given to them to call me, but calls are never returned. Why should I, as the customer, wait because my case is being investigated? No-one seems to know or can account for what happened to the rest of my items.

This is insane.