How can a victim of a crypto scam claim his money back?

Good day,

We are a group of people and residents of the UAE who invested in an international company that called themselves an investing company and promised their investors a big return.

In the end, we realized that the company was a scheme/pyramid, but unfortunately, it was late as we faced a company scam. And we lost a lot of money. Cases were opened all over the world against them.

The leaders of the company who called them "10* stars" were residents of the UAE; some of them still live here and they introduced us to Finiko schemes.

We need advice on where to start the case in the UAE and what is the right department to go to as the partners who were the main people of the company are hiding in the UAE with all the money?

Kindly note that all investments were done by crypto in bitcoin currency. All victims have the evidence.

We have sent complaints to e-crime, but the applications of all the victims got rejected and we cannot understand why.

Thanks in advance!