reference number is [protected]. I bought tickets for three people from Montreal to Calgary, round trip, for four days, August 24th to August 28th. I was paying 1853.76 for the 3 tickets. I have a pdf of the payment confirmation I got on the day I made on the purchase, showing that the amount was indeed 1853.76 CAD. One week later, I discovered that I was charged twice on my bank account, for amounts of 1853.76 and 850.43, separately. I was charged an extra 850.43 WITHOUT my knowledge and approval. I went to check the page of flight details, the total was up to 2704.19. I contacted customer service twice. Once by text, I was told that it was due to currency difference. I double checked, all transactions were in CAD in the proofs that I kept. Second time I called, and the quality of the call was horrible. I couldn't hear what the person was saying while SHE HEARD ME PERFECTLY. I managed however to explain my situation. The person made me wait, came back to me 2min later, pretended not to hear me, and HUNG UP. All I want is to be refunded the extra 850.43.