Kesari Tours — Asking extra money and not refunding booked money

Hi Guys,
I have booked a tour with kesari tours on 25 june 2023 for leh Ladakh. They told they booked go first flights which is cancelled so they are rebooking with indigo and asking 50000 per head extra. I can't afford this extra air fare.
Also go first is not yet cancelled flights after 26 may. I am not sure whether Kesari is cheating.
I would like to inform you that as a handicap and single lady, I will not be able to book flight tickets on my own. The reason for selecting Kesari is due to its good customer service and empathy towards customers.I am a single earning handicap woman so I will not be able to pay extra money . So If kesari can take me on the NK2506P3 tour on[protected] as decided then it's fine with me, otherwise Kesari should return all my money .