No delivery of online order. No response from support

Placed order online on 24 Nov. On 30 Nov I received an email stating "order delivered". There had been no delivery - somebody is here at all times. I responded by email. I also opened support ticket via the website. Tried to use the online chat, but received message "an error occurred". I called the support centre, and after very poor quality telephone line (sounds like faulty headset) - was told it would be delivered 'tomorrow'. I sent additional emails and updated the support ticket every day. Never any response. Webchat bot on the web site still not working. On third phone call (6th Dec) was told it would be 'delivered tomorrow'. Same problem with telephone line on each call - so a system problem for whole call centre.