Unhappy Target customers are leaving angry comments on the company's Facebook page.
Some say they'll stop shopping at the chain after it revealed about 40 million credit and debit card accounts were stolen.
Target says customers who swiped their cards in its stores between November 27th and December 15th may have had their accounts exposed.
Online purchases weren't affected.
Customers also say they can't reach the company's call center or Target's credit card website.
Target says it is adding staff to field calls and help solve website issues.