I hired Drain Doctor based on the reviews given below. I regretted my decision and this was what had happened. I needed a new sink and tap and hired Drain Doctor to install them for me. After the work was completed, I found out that the hot and cold water mixer had been installed incorrectly, namely when you turned the mixer to the hot water side, you got cold water and vice-versa. The water flow of the new sink was extremely slow plus there was a leak underneath the new sink. Enough problems, we called Drain Doctor and they did come back to fix these issues.
We thought the problem should end here. Unfortunately, its not. Not long after, we were advised that the water tap which they installed by drilling a hole through our brand new laminate bench top was going to kill our bench top. The hole is slightly bigger than the tap. Hence it created a gap between the tap and the bench top. A cheap and easy option is for us to get the gap sealed by silicon, however, it will still slowly absorb moisture into the laminate bench top causing swelling and lifting in the long run. Eventually, we spent hundreds of dollars to rectify this issue by almost redo what they did. We remove that first sink and install a bigger sink to cover the hole drilled on the bench top. In hindsight, we understood there was no tap hole on the first sink we bought. However, as an experienced professional plumber could have advised us properly. They could have told us to get a hole punched on the sink to allow the tap installed onto the sink, or drill a hole through our bench top which will cause damage to our bench top. Sadly, we have not been given any advice; its just been done without any consultation.