Unscrupulous charging by electrician.

I had high hopes for this company, when I called them out for a tripping problem. R650 callout fee, they were to assess the problem, and quote, within 20 min the job was done, impressive. A rewire and 20 amp circuit breaker replaced and I was hit with a R2250.00 bill. I paid, only to find out a circuit breaker cost is 150.00 the time was within the callout fee, so how do they justify this? On enquiring the owner Dennis's answer was he studied, and next time I should call someone else, but he can't/ won't tell me what the R1600 was for. After phoning around I should have paid between R850.00 and R1100.00 Ethics and morals are sorely lacking when people get away with this.