A Little Too Trusting

The following is from a question who is a customer of a customer.

Woman: I have a Woolworths Everyday Rewards card and am at present receiving reminders to enter a competition for Christmas, yet each day the message says “Merry Christmas [Name]'” – my name is not [Provides her full name] so I wonder if they are registering me against the correct card number or whether someone has the same number or something else that would cause this oddity to happen – my card number is [Gives FULL card number]- I am in Brisbane, Australia – I did try to query via email but was asked to use this [provides a wrong and unrelated] website.