Some shoppers who discovered super savings online are now upset saying CVS has canceled Christmas.

One of those customers is Sierra Warlen, a mom who recently gave birth to her second child. Soon after, a photo shoot with her newborn was top priority.

"We had professional pictures taken a few months ago and we're excited to get them all over our walls," Warlen said.

She searched her Facebook groups for a good discount on canvas prints when she discovered an incredible deal.

"One of the mom's had posted a great deal with five different codes that were active," she said.

Warlen immediately signed up online and purchased 11 canvas photos of her newborn. What should have been a $330 purchase totaled up to less than $30 after coupons.

Warlen says her online payment was accepted and processed for a deal she thought was too good to be true.

"The next morning when they were still working, then working the next afternoon I thought, it must be real, they must be putting on a really great deal right now," she said.

Four days later Warlen along with other shoppers that had used the coupon received an email that the company was canceling the orders and refunding their money.

The company's email to affected shoppers blamed a "system error" that accidentally allowed customers to stack coupon codes.

Immediately, shoppers took their fight to social media, claiming CVS should have honored the deal. The hashtag, #CVScancelledChristmas, started trending Thursday. Many are now vowing to boycott CVS.

"You owe that to your loyal customers, not to mention you made a lot of new customers," Warlen said.

Though CVS canceled those orders, Warlen says they did offer her a 60% discount in return. She says she'd still be paying at least $130 more than the original discount.

CVS issued the following statement to NBC Charlotte Thursday:

"Due to a system error which has since been corrected, some shoppers were able to stack coupons using multiple coupon codes, which is against our discount policy. As a result, we unfortunately had to cancel canvas order that used stacked coupons. All customers whose order was canceled due to this issue received an email from us with an offer for 60% off all canvas prints. All canceled canvas prints have been saved in those customers' order histories for easy reordering. We apologize to any customers affected by this inconvenience."