Agder Vvs Rør

To years ago this company installed our bathroom sink over a classic furniture. They connect the pipe under leaving the wood platform expose completely to the drainage water. This past summer we hired another plumber to change the surface and plate that was completely destroyed by the water and to make a new properly connection between the drainage pipe and the under pipe. Basic knowledge of how to connect pipes was shown in this costly big mistakeplumber don't understand that the wood ican