There are only 3 countries neighboring Cambodia. It could help to mention the country as different countries have different guarantees.
The thing you can do right now is to try and get hold of someone in the bank that can freeze the flows, for the possibility of returning the money. Otherwise, not much can be done.
It's always going to be near impossible to get money back out of Cambodia, which is the implication in the post. You can trivially figure out where the author of the post lives too, but I'm not sure there's much usable advice here.
It is almost impossible. Unlike in developed countries, where banks can offer some level of protection to customers, in third-world countries, banks mainly protect themselves. All responsibility is pushed onto users. Banks take no accountability, and the government protects the banks.
Let me give a concrete example. When money is transferred to scammer accounts, it is immediately distributed across hundreds of other accounts and moved out of the electronic system in under 30 seconds. At that point, everything is gone.
The thing you can do right now is to try and get hold of someone in the bank that can freeze the flows, for the possibility of returning the money. Otherwise, not much can be done.