Substandard work from a building contractor

Be careful people. Johann Geghardt over-promises and under-delivers. His work is substandard and he charges a fortune for his travel and rubble removal as well as rips you off for every possible thing. He cannot be left to carry out instructions. Doesn't measure one thing correctly. He leaves parts of the job off the quotes, submits quotes in phases to create multiple deposits, and sends surprise invoices for things he promised to do as a favour. His workers damaged my existing bathroom and steps which he didn't repair, not to mention ladders, wheelbarrow, hosepipe fitting, watering cans which he promised to replace but didn't. He said the renovation would take 3 weeks and it took 2 months and he walked away keeping my deposit for wooden flooring to cover other work half done. Not one room is finished. In the kitchen he installed, the gap was too small for the dishwasher but luckily the counter people made a plan. The entire kitchen island is also skew, kick-plates are full of joins. I can go on, and on.