Paid for kitchen renovations but not delivered

Jason promised me that he would be able to totally gut and refit my kitchen last year (2015). It was close to the December Holidays and unfortunately it did not work out. This was the least of my worries and understandable as things do go wrong in the rush to finish jobs before the end of the year. I was ensured that everything would be completed in the first working week of January. It is now mid-Feb and my kitchen is still not completed, the carcasses are in but there is still a lot of work to be done. I am missing shelves draws, doors etc so still can't pack my kitchen. The worst thing is that I have already paid 90% of the money. Furthermore I am being harassed by his subcontractors who have not been paid and they have even threatened to remove the granite that was installed and the cupboard installer phoned me incessantly demanding payment. I have heard an excuse almost every day, he promises to still honour our agreement, however today is yet another day I was told an installer would be onsite to fix my issues and I am still waiting.