In Buddhism, the preferred practice is to cultivate wholesome or skillful states of mind in any situation.
In this scenario, you should not bear hatred or ill-will or anger or any such negative states of mind.
You can do this by cultivating compassion.
For example, ask "why did those people cheat others of their money?" Perhaps, they are desperate for money due to personal financial crisis? Or perhaps, their lack of understanding of the Dhamma leads them to act in ways that would lead them towards unfortunate future outcomes? In any case, those cheaters are suffering, and would continue to suffer due to their unwholesome mental states of having the intention to harm others.
Another way to view this is to consider that the cheaters are overwhelmed by negative states of mind, so much so that they are not able to see the right path clearly. It's like they are suffering from a disease of the mind. If you see it that way, you can also cultivate compassion towards them.
If your grandmother who is suffering from senile dementia speaks or behaves in a hurting way towards you, would you feel anger towards her? No. It's because you understand her condition and are compassionate towards her. Similarly, you can show understanding and compassion towards the mental condition of the cheaters.
However, this does not mean that you should let them do as they wish. You can still lodge a complaint with the police and follow the procedures laid out by the law. However, you shouldn't do this with hatred or anger or malice in your mind. Instead, you can do so out of compassion for other innocent people, wishing for them to not suffer from the malicious actions of the cheaters.
At the same time, it is also not wrong to consider getting your money back if that's possible.
If the people who cheated others are punished by the law, they might become repentant and change their ways. So, by informing the police, you are also acting in a compassionate way to help them change their negative way of life.
So, the main point here is that you can still lodge a complaint with the police, follow the procedures laid out by the law and try to get your money back. But the Buddhist way is to do so with wholesome states of mind like compassion and loving-kindness, rather than with anger, hatred and malice. When you understand that those who try to harm you and others are suffering in their mind, you can respond with a compassionate perspective.
This you can see from Dhammapada 1:
All mental phenomena have mind as their forerunner; they have mind as
their chief; they are mind-made. If one speaks or acts with an evil
mind, 'dukkha' (suffering) follows him just as the wheel follows the
hoofprint of the ox that draws the cart.
And Dhammapada 124:
If there is no wound on the hand, one may handle poison; poison does
not affect one who has no wound; there can be no evil for one who has
no evil intention.