Originally purchased my tickets to travel on 12/26/2020. Due to the pandemic, health concerns, and the border being closed except for essential travel, I was forced to cancel my trip. When I called Volaris to make the change, or at least cancel the trip, I was told that if I didn't fly, I would lose the cost of my tickets, essentially, I would lose everything I has paid, $1365.98. This was reservation TYRWYZ. I was told that I had to pay the Flexibility Combo in order not to lose the $1365 that I had already paid. In addition, I had to pick a new date to travel, not just cancel. Since at the time I had no plans for summer travel, I just picked a random date, thinking that the Flexibilty Combo I was being forced to purchase would allow me to pick a date when I had actually made my new travel plans. I paid an additional $411.93, even though I had previously paid for Trip Assistance, which I thought would allow me to make changes. So by now I have paid almost $1800 for my three tickets. Today, June 8, 2021, I attempted to make a change for my actual travel dates, and so I went online and tried to change the date. All summer was greyed out, not allowing me to pick any dates. So I had to call Volaris, and was told that the travel dates that I wanted to choose now were high season, and yes, I could reserve the dates I wanted, but had to pay the fare difference. In the end, I spoke to a Supervisor, and was told I would have to pay an additional $587.69 to travel from July 29, 2021 and returning on August 7, 2021. I was furious! I argued and argued about why I had to pay an additional fee, I had originally book on an extremely high busy season, at Christmas, so summer was same thing. I explained the reason for not traveling in December, the pandemic, so I couldn't travel even if I wanted to, because of borders being closed. And now, I have to pay an additional $600! Nothing I said got through, and yes I was very frustrated, but Supervisor said if I wanted to travel, I had to pay more. I asked what the Flexibility Combo was for, and he explained it was to rebook reservations, but during low season! I asked who travels at the airline's convenience? I can only travel certain dates, around work schedule, same as most people? How sneaky can this airline get? Why is rebooking flights during a pandemic such an issue, and penalizing the customer? I feel this is so wrong on so many levels!!! I had to cancel the original reservation, and now I am being penalized! I cannot afford an additional $600! I already paid way more than what is fair. In fact, if I go in now and book a brand new reservation, it would cost way more than the $1800 I have already paid. Therefore, I cannot understand the additional fee I am being asked to pay! New reservations for three people with seats and baggage are under $1500 right now. Please help me!