Fraudulent builder unsafe stairs.

Fonso Construction provided me with NHBRC Certificate and after reviewing my plans quoted me R100 000 to build my extension. During Construction there wee many errors including the one of staircase. The rises are uneven and thread too small for footing. Farai Elfonso brought his builders to repair by adding bricks and plastering. Those builders still got it wrong s engineers said they are wrong and dangerous. Risers uneven and thread better at 250mm. I even fell down the stairs to show how uneven they are. Many builders have come to inspect and said it must be fixed. Fonso Construction refuses to fix the stairs.