Wrong order and delivery delays.

I’ve put my online order in at Dail a bed on Monday morning at 06h00 for a double bed set and Thursday delivery has been made with a double bed mattress with a three quarter base. I sent it back and expect delivery to be made on Friday as the agent said that will be the case. Today is Friday and the agent said it will only be delivered on Saturday after I explained to them it is their fault to sent the wrong order at first and their system being offline since Monday. I am deeply disappointed in their service. I ordered the bed set on Monday because I am having family over for the weekend but until today there’s no bed.