Still waiting for delivery! Almost TWO WEEKS later! Order #***0

I ordered a desk (Order #***0) on 1 September 2019 and it still has not been delivered. The first delivery was scheduled for 4 Sep before 17:00, but was then delayed, claiming that it would be rescheduled. It never was. After phoning the helpline (which was not particularly helpful) delivery was rescheduled for 11 Sep before 17:00. It still has not been delivered and I have not received any updates or information regarding why not.