Appliance Repairman

Ugh ... wish I had checked this site first ...
So $80 to come check it out and then they give a quote. If you agree to their quote and accept their s$80. I foolishly agreed, had their technician, Nick, come check our dishwasher that wouldn't drain. $360 to clear the drain!!!! 20 minutes and $360 dollars later, this guy leaves and my dishwasher is draining. Okay, sounds good, even though stupidly overpriced. I look, and there is an o-ring sitting by my kitchen sink that certainly wasn't there before: I don't tend to see a lot of o-rings in my life, considering I call a repairman just to get my dishwasher to drain. I try the dishwasher. Drains like a champ. Dishes are still dirty :/. Several weeks later (I went on vacation just after this happened) I call them and tell them what the problem is. They say someone from customer service will call me back. I wait a week, no call. I then call them back again, someone I can barely understand tells me they'll call me back that day. I wait. No call. About four days after that I call (today), and they actually transfer me to a customer service rep (hooray!). That person tells me that for a discounted $50 they can have the same technician come out and look at the dishwasher and determine what needs to be fixed, and will then give me a quote for the cost to fix it. Wait. What?! So, I'll have to pay you a guaranteed additional $50 for you to come back, tell me you forgot to put this o-ring back, and then charge me an additional how much to put it back in?!? Didn't I pay you enough the first time to at least put the dishwasher back together correctly? Why are you charging me for your inability to put the machine back together correctly? Oh, and they told me it could be the drain pump (no issues draining, just cleaning ... so don't know how it could be the drain pump) which will be $424.84 before service fees. What is this place?
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Avoid like the plague!