appliance repair team

The service guy showed up and had no idea what was wrong with it. My husband gave him our shop vac to suction the hoses. He was on the phone constantly trying to talk to another employee. They Only take cash payments, no credit card, which my husband was charged $317.00 and the dishwasher still doesn't go through the cycles completely and dry the dishes. Now they want another $477.60 to order a new part to see if that will fix the problem. I have no idea what the $317.00 was paid for when it still doesn't work properly. They completely ripped us off as my machine was never fixed and the repair guy didn't know what the problem was.
Janet Kane