Barclays US Credit Cards review: Fraudulent offers

0% offer was mailed to current customers. When I completed the offer, Barclay cancelled without reason. I called to verify the transaction, and three different people gave three different dates/reasons for cancellation. Further, two stated that I could process again once the cancellation fully processed in 7-10 business day from one of the dates given. The second process had to clear before the deadline, again requiring another 7-10 business days. Given the time frame of the offer, this is conveniently not possible. The WORST customer service and incompetence in a business.