If you need telephone customer service for Costco, ignore the estimated wait times you are given. First, you will be told they are experiencing "longer than usual wait times" so "try again another time." Don't hang up; ignore that. Then you will be told the wait time is 20 minutes. Ignore that. Then you are given the option to put in your phone number to get a call back without losing your place in line. Do that. Then you will be told you'll get a call back in about an hour. Don't worry. You'll likely get a call back within 10 minutes.