I hate terrible customer service

I ordered a new dishwasher a month ago from Sears. They called in two weeks to say come pick it up and when I got there they couldn't find it. Their records said it was there but it wasn't. They said they would give me a $50 discount and reordered it. Here, two weeks later, again they left a message and said it didn't arrive and it will be here next week. I was getting ready to call and fume at them when I noticed they didn't give me a $50 discount, it was $100. I'm torn now. I so wanted to grouch them out.