Constant failed promises and failure to complete project

The coding ability of Darren Tucs is unquestionable and the value he offers would be excellent if he delivered what was promised. I engaged Darren to add some coding to our website. He was very quick to request deposits and balances - citing personal reasons that he required the money - but failed to deliver the coding for which he had been paid. He didn't seem to be doing any work, and did not provide any updates. I was forced to beg, cajole and threaten legal action for a full year, before he finally delivered the coding, one year later than he had promised. I am unable to use the coding correctly as the product manual I have paid for has never been supplied. Each time I try to contact him on Skype or Whatsapp he simply ignores and changes his status to "offline". Emails are ignored, and phone calls go unanswered or are cut off in my ear. I have avoided making a public complaint as I really can't stand the idea of damaging a person's business. However, I cannot get him to respond in any other way, and I am hoping to spare other small businesses the experience that I have had.