Isel Oli

I had purchased a round trip and paid for flexible flight to make changes with charge of fee difference. I made the payment they requested 24 hours in advance from my original flight. I made the $300 payment that they had told me it was the fare difference. I was informed the next day that I had to make another payment of almost $500 usd Spoke to many agents they gave me a bunch of runarounds. They told me that my flight was secure. They will be sending me my new booking flight every single time but then they will try to charge me again. I informed them if they were going to charge me more the