Appliance Repairman

I was told my dishwasher was not working because it was dirty. The technician was 100% sure this was the issue and it was $330 to fix. After 30minutes when the dishwasher had been cleaned, the technician was surprised to find the dishwasher still didn't work. After calling Bosch directly, he concluded it was the pump. I decided it was better just to buy a new dishwasher and was ready to pay for the service call but told i had to pay the $330 because the "labor was done" even though the diagnosis was wrong and the dishwasher was still broken. I feel totally taken advantage of and will never use to recommend this company to anyone.