Digital Planet REFUSING to ASSIST

Digital Planet refuses to provide customer service or attention to the issue below. I have raised it several times via their website query suite, via email, via telephone (in excess of 5 phone calls already) and NO SERVICE, NO ATTENTION and NO FEEDBAC****

Placed order on the 14th of May. Was promised delivery today, the 23rd of May between 09h00 and 17h00. On Tuesday, 21 May, I was notified that delivery would take place on that day. I was not happy that they changed the date from one that suited me to one that does not suit me, so I phoned to change the delivery date back to today, the 23rd of May. Despite calling three times and waiting for the whole day, delivery did not take place. I am not always available and I'm really quite disappointed in this company for wasting my time like this. Will the order be delivered? If so, when? I'm fuming with frustration. There's no way for me to personally call the courier and ask what's going on. I have to phone Digital Planet and they know just as much as I do. Please, please find a solution - ASAP.