I have reserved 7 flight through Kiwi with Spirit Airlines. Within 24 h I realised that I made a mistake on the flight date. I made a change and saw that Kiwi wanted to charge for both flights. When I told them I thought I could be reimbursed, they told me to go through the refund process on their website. I did.
Just to make sure, I called Spirit and explained the issue. They said that they would fully reimburse Kiwi because the change was make within 24 h and it was an american law.
Today, I received the answer for my refund request and Kiwi said they could not get reimbursement from the airline and I would have to pay double.
When I tried to reach them to tell them there had to be another way, all of their contact information on their website was 'temporarily unavailable'.
I feel like they have stolen from me.

I sent so many messages and emails regarding my refund but no reply

That's the exact same thing that happened to me. Flights were cancelled and my confirmation codes are all inactive now: temporarily unavailable.

I found out they use an overseas credit card to pay for everything, so when you cancel the flights the money goes back to their card, not yours.

They customer support doesn't care about you, they dont care about any situation and won't help