Costco Customer Service Number Online. To 5 p.m., eastern standard time. Contact costco canada customer service.
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Costco customer service phone number phone number: Shop by departments, or search for specific item(s). You can call costco online uk at phone number, write an email, fill out a contact form on their website www.costco.co.uk, or write a letter to costco wholesale uk ltd, 213 hartspring lane, watford, herts, wd25 8js, united kingdom. How can we help you?