On December 6,2017 I booked round trip tickets from Gander,NL to Fort McMurray,AB for my wife and I with Cheapoair and paid them $1242.22 by visa. The departure flight was to leave Gander at 2:35 pm on April 27,2018 and return on May 19,2018 leaving Fort McMurray at 10:50 am. Around The last of January I received an e-mail from Cheapoair saying that my return flight had been changed to a night flight leaving Fort McMurray at 12:25 am and arriving in Gander at 2:38 pm that afternoon. Since my wife and I are seniors and find nighttime flying very hard I cancelled the return flight and after threatening to file a complaint The full amount of my return flight ($633.00) was credited back to my visa on february 8,2018. On April 25,2018 just 2 days before my departure flight I checked on Cheapoair's website and my flight was still confirmed but the return flight for May 19 was still there as well. Being curious about it I checked the airline confirmation number on the Air Canada website and was told that that booking had been cancelled.I had not been refunded for the departure flight and had not been notified that the flight had been cancelled.I was on the phone for about two hours on the night of the 25 and was told by three different supervisors that they would fix it within an hour or so.They never did I was given the runaround the next day by three or four other agents until I finally told them to give me a refund or I would talk to visa and file a dispute.They then agreed and sent me an e-mail stating a refund of $609.22. If I do get the refund in the next week or so they will have refunded me a total of $1242.22 which is the same as I originally paid. Fair right? NO not fair at all! When I rebooked my departure flight for the same day (April 27,2018)it now cost me $1515.42. I quickly realized why they had given me the runaround and why they promised to refund my return fare with no cancellation fee. It was because for them to fix "their" mistake they would have had to pay the new (late booking) price of $1515.42 to the airline. I booked my return trip with Westjet on Feb. 9,2018 at a cost of $639.00 and because of cheapoair's fault I had to ook my departure just hours before take off. It cost me another $1515.42 for a round trip total of $2154.42 an extra cost to me of $912.20.I don't think that I should have to burden this extra cost.We are low income seniors and this stress caused by Cheapoair really puts a damper on a very special trip to see our grandchildren that we were so looking forward to. Any help as to what we can do will be appreciated. Thank you. BTW after multiple phone calls they have refunded me a total of $700.00 which was the $609.22 that I paid them for the trip that they cancelled and the other $90.78 I guess was to shut me up. They still owe me more than $800.00 that they cost me by cancelling that flight for no reason.