Order gone so very wrong

At the end of May I ordered a desk from @home Melrose Arch - a corner unit that could be assembled in various manners (Soho Corner Desk). I was told I could expect delivery towards end of June. June came and went with no word from the store. After 3 visits, I was informed that delivery had been delayed by a full month. During this time I had removed my home office desk and had no work space. Finally at the end of July I received notification to come pay the remaining 50%. Delivery was arranged and specified for when I could meet the delivery (confirmed twice). I was then called to say they would be coming on a different day, which I could not manage and thus delivery was delayed another week. It was specified for Tuesday between 1-2pm. 2pm came and went (while away from my job as a health care provider). I called the dispatch centre and was informed that, due to an administrative error, the delivery was not coming. It was re-arranged for Thursday at 4:30pm. After coming at 10:30am the delivery arrived at 4:00pm. The final straw? The new stock of the desk can only be assembled in 1 formation - a fact that not the store, but the delivery men, were aware of! Never again!