Columbarium on hold

I hired someone to build a columbarium.  We agreed on niches top to bottom of the 170 feet of wall.  It was to be 6 feet tall.  He took my money, poured the footing and then refused to do the rest the way I contracted with him so the columbarium is on hold until I work this out.  I want what I paid for and nothing less.  He refuses and has left a mess at the cemetery.  I promise to get this cleaned up and straightened out.  Please be patient.