Harry Potter star Matthew Lewis calls Air Canada the worst airline in No...

Matthew Lewis calls Air Canada the "worst airline in North America" for overbooking.

after the employees 'ripped up' his first class ticket and sent him down to economy 'without saying a thing' about it.

Matthew Lewis has been vocal in his criticism of Air Canada after the airline, in his words, 'ripped up' his first class ticket and forced him down to economy class due to a 'full flight.'

The 33-year-old actor, best known for his role as Neville Longbottom in the Harry Potter film series, took to Twitter on Friday while on route from Orlando to Toronto to vent his frustration with the airline.

Because, according to him, the airline "ripped up" his first class ticket when he arrived at the gate, he ranked Air Canada as the "worst airline in North America." He formed this conclusion based on his experience with Air Canada.

Matthew said that he was informed he needed to phone the airline in order to get a refund after he was given an economy ticket instead of an apology or the opportunity to rebook his travel. He also claimed that he was not given the chance to rebook his journey.

"It's official—@AirCanada is the most unreliable airline in all of North America." And that really does speak volumes,' he wrote in a tweet.

'No email. There was no offer made to rebook. My first class ticket was ripped in half in front of me at the gate, and I was handed an economy class ticket before the agent went away.

"Not a single word," she replied. I had no choice but to call her back and ask, "Why?" Lol. Problems with privilege, to be sure. But it's still a wild ride.'

Matthew criticized the practice that airlines use of overbooking flights in a series of responses. This practice involves selling more tickets than there are available seats on a plane in order to account for passengers who do not show up for their flights.

When referring to airlines that have more passengers than available seats, he wrote, "I've been bumped before." My opinion is that it is an absurd policy that we have for some inexplicable reason normalized, but it is what it is.

Having stated that, that is not the concern of mine. I wasn't informed until it was time to board the plane, there was no apology, no one asked if I would like to rebook, and in order to get a refund, I have to phone them.'

He went on to say that it is "INSANE" that as a culture, we have allowed overbooking on planes to become something that is considered normal and that we all tolerate. Amongst so many weird things.'

Air Canada sent a response to Matthew's stream of tweets by requesting that he message them in an effort to find a solution to the problem.

The airline responded with the following: "Hi Matthew, we are sorry to learn this." We ask that you give us a direct message with additional information about the problem, and we will investigate whether or not we are able to assist you from here.

After some time had passed, Matthew shared with CTV News Toronto that despite his criticism of Air Canada's customer care, he had not yet had the opportunity to talk with a representative from the airline.

He remarked that the customer service at Air Canada was terrible. "We as a society should not be cool with normalizing the profiting of overbooking and forcing people off aircraft," the author writes in the introduction to the book.

Air Canada stated to the publication that the situation was being investigated and that it was unable to provide any more comment at this time.

Matthew had been on the trip to Toronto for a Fan Expo, where he was selling autographed signatures or photographs, and he had been traveling there in preparation for the event.

The celebrity gave the impression that he was having a good time during his visit to Canada, as he later tweeted, "Well Toronto, you were all wonderful." A long overdue visit and you didn't disappoint. Absolutely great human beings. Someone's city.'