NEW YORK – Target is a victim of its own success.

The discounter drummed up so much hype around its exclusive, limited-time line by upscale Italian designer Missoni that its website crashed and was down most of the day on Sept. 13 when the collection was launched, angering customers.

More than a week later, some shoppers who bought the Missoni for Target line are posting on social media websites Facebook and Twitter that they won’t shop at Target again because their online orders are being delayed – or worse, canceled – by the retailer.

Brielle deMartino, 23, from Del Ray Beach, Fla., was so excited that she woke up at 6 a.m. on the launch day and spent $700 on Missoni clothes, a bike and plates. The next day, she got an email from Target that her online order was canceled. Then, she spent hours on the phone with Target customer service representatives she describes as unapologetic.

“I have never been treated like this,” said deMartino, who got the charges removed from her card after calling her bank and posted on Facebook and Twitter about the ordeal. “Instead of taking responsibility, they didn’t care. I have always been pro-Target, but I don’t want to give my money to a company like that again.’

Talk about having a bull’s-eye on your back. Target became the discount industry’s darling by making it cool to buy stylish clothes and trendy decorations at the same place you pick up toothpaste and paper towels. But recently, it has suffered from similar public relations nightmares as its rival Wal-Mart Stores Inc. Earlier this year, Target had its first union election in what is seen as a precursor to more labor disputes nationwide. Now, customers are blasting Target on websites like Twitter at a time when Americans worried about the economy are easily being influenced by what their friends say on social media websites.

“This was badly handled,” said Robert Passikoff, president of Brand Keys Inc., a New York customer research firm that has an index that shows Target’s image has taken a hit. “What was supposed to be engaging and delightful is now the opposite — disappointment.”

Morgan O’Murray, a Target spokeswoman, said the company experienced unprecedented demand for the collection and is working on correcting problems.

The Missoni collection was an attempt by Target to regain the cachet it lost among the fashion-forward crowd after it began focusing on expanding its food business. Target is among a few retailers who have partnered with high-end designers that create exclusive lines they can offer for a limited time at deep discounts.

The collections can spur demand by creating a sense of urgency to buy. Last year, Target scored big with a line created by Liberty of London, offering 300 items with the designer, which is known for its floral prints, and selling out of most of it in a couple of days.

The retailer tried to recreate that success with the Missoni line, which featured stationery for $2.99 up to $599.99 patio furniture at a fraction of the cost of the designer’s original works that can go for $595 to $1,500.

Target also opened a temporary store in Manhattan at the start of New York Fashion Week on Sept. 8. The temporary store, which spanned six blocks, was supposed to stay open three days, but closed after items sold out in six hours.

By Sept. 13, the day of the launch, Target said demand for Missoni items rivaled the frenzy on the day after Thanksgiving, which is typically the busiest shopping day of the year. More than 100 customers lined up at stores nationwide. Some locations sold out in a few hours.

The buzz turned to frustration for some shoppers on Target’s website. Some who were patient got through. Those who weren’t left the website disappointed.