Amazon error and refusal to correct it
Amazon made an error and took the money off the 9 gift cards I gave for Christmas.  Any attempts to use them were denied.  No number of contacts to customer service would convince them to reactivate the cards.  On two occasions, they e-mailed and said they were activated and could be used.  That proved false as the users were denied again.  The final solution was a refund and purchase of new cards.
Rating: 1 stars