Best Concrete Pier Installation in Washington DC

Quoted $650 to install a sink and a stand pipe on an existing drain.  Stand pipe went in no problem, but the sink was another story.  He cracked the inlet valve to the faucet during the install and tried to tell me it came that way.  OK whatever - I paid him and he said he would come back and finish the job once I got a replacement valve.  But as soon as he left, he ghosted me.  Multiple scheduled dates, multiple days off work, he just never showed, sent excuses over text, and then did it all again.  I ended up giving up and finishing the job myself.  What gives man, why not just tell me you weren't coming back?