Store Manager

A few days ago I got a call.

Customer: "is this the store manager?"
Me : "yes, how can I help you?"
Customer: "you guys sold me a piece of crap. You need to get out here now and fix it!"
Me: "OK, I will do what I can, can you let me know what is going on?"
Customer: "I bought a dryer from you and it keeps making a buzzing sound."
Me: "What kind of buzzing sound?"
Customer: "It happens when the dryer is running, I don't know what it is, you just need to come and fix it, I am not answering anymore questions."
Me: "I will get a service tech out there tomorrow to look at it."
Customer: "no, you will come out and replace it tomorrow or I will never shop with you again and I will tell everyone I work with that you sell junk."
Me: "OK, sir, let me call the delivery center and see if I can get it swapped out for you tomorrow."
Customer: "you had better"
Me: " I will call you back in a few minutes."

30 minutes later, I call back.

Me: "I will have new dryer out to you tomorrow."
Customer: "Never mind"
Me: "Why"
Customer: "my wife came home and told me that was the sound the dryer makes when the clothes are done."