Amy Schumer has apologized to her fans for her short show in Portland, Maine. The comedian's 7:30 p.m. performance at the Cross Insurance Area Saturday night lasted only about 35 to 45 minutes, leaving many fans feeling cheated, especially after they learned that the following 10.30 p.m. show went on for an hour, according to The Portland Press Herald.

Several fans took to social media complaining about the length of the stand-up act, asking for a refund of the $80 ticket price.

"Have seldom felt so ripped off at a show," tweeted Richard Machlin. "Who do I contact for a refund? Disgraceful."

"Cross Arena you owe a refund to all your customers who bought tickets to the 7:30 show! We bought our tickets first and got the short end of the deal! So disappointed!" commented Michelle Cloutier on the Cross Insurance Arena's Facebook page, according to Portland TV station WCSH.

Matt Herpich, who manages the venue, said on Monday that they would not be issuing any refunds and that Schumer did "two full shows." Herpich said the stand-up performance was "awesome" and that the comic "really connected" with the crowd.

However, Schumer admitted that the show was short and took to Twitter to express how bad she felt about it, blaming the brevity of the show on the the need to accommodate two audiences.

"Loved the first crowd in Portland," she tweeted. "Felt short to me too. Had to keep the show under 70 mins to move the next crowd in."

In another tweet, she replied to a fan who called her "a bit smug" for performing just a 40-minute stand-up set. "I did 47 minutes," Schumer wrote. "We had to keep it to a 65 minute show to clear it out for the next one.

Schumer later said in an interview with WCSH that she didn't realize the performance was so brief.

"It was a rookie mistake, but I was following directions. I feel horrible about it, but I promise it wasn't laziness, or that I didn't respect the crowd I have to be out there, it was strictly a rookie mistake, and I'm sorry that they had to pay for it," she said.