Here’s what consumers have asked with answers from Costco staff and previous consumers.
Go to. Costco.com and after you give them your zipcode you will be given locations of warehouses near you with phone numbers. The website will link you to a lot of information about Costco.
Sometimes happens that the article is seasonal and doesn't appear again for months. Costco doesn't sell surplus merchandise, everything they sell is first rate. If you have problems with an item call corporate hq. They are extremely happy to help solve problems.
I don't think it's from Costco. It seems like a scam. Costco email id should have been someone@costco.com. Please do not send money to individuals. You should have placed order through their site www.costco.com or directly bought from their store. In any case, you couldn't have been anything from Costco unless you were a member. Feeling sorry for you!