Extremely expensive and not professional

I got Aqua tech out to fit 4 angle valves and fix a leak in the kitchen. The plumber assured me that there is no leak its just the water spilled from the sink. In the meantime there were three leaks that another company had to come fix after hours. Aqua tech charged me R2300 to fit 4 angle valves. It took them 2 hours to do this. I complained and they said there's nothing they can do. I should just pay it.