Poor service and communication from the online sales department

I ordered a bed from Dial a Bed on 02 January 2019. I called their support desk a number of times just to get a voicemail On 25 January I received a call from one of their staff asking whether I had asked for delivery. I advised that this was clear from the order. He then called back again advising that delivery will be made on 28 January 2019. Having not heard from Dial-a-bed today, I called today but again only received the automated answering machine. I have also sent a mail to the call agent, and am still awaiting a reply. I made specific arrangements to be available today for delivery - Poor service Dial a Bed