It really depends on the nature of the scam. In P2P trading, fiat is usually involved. So regardless of whether crypto is involved or not, it can be taken up by the court of law. Even in my country, crypto is not recognised in any way legally. Still we often face bank freeze issues and it can be taken up with legal enforcement team.
Can op please be specific what kind of scam you are referring to?
This can only be taken up in country where crypto activities are allowed, otherwise no way. In my country there is not outright ban of cryptocurrency activities but there is a prohibition that you trade crypto to fiat through the banks. The banks doesn't accept this, unless you are using the false CEX p2p where you still use the bank but not putting narration relating to crypto in the transaction.
So, let's assume there is a legal confrontation, on mentioning that you transacted cryptocurrency with a particular bank, it is a problem to the bank and they will even freeze your account and the remaining balance. The only people to solve the problem is the central authority controlling the p2p
In Russia, the situation is similar. Cryptocurrency is not prohibited, but banks are required to verify payments and prevent illegal commercial activity on accounts of individuals where this activity is prohibited. According to Russian law, there are no clear criteria for blocking bank accounts, and therefore each bank chooses its own policy. The bank can block any transfer of money on suspicion, and you will not sue for business damages because you have an agreement with the bank that prohibits commercial activity through this bank account.
There is a maximum transfer limit, which is 600,000 rubles ($6,200), about which all data is automatically sent to Rosfinmonitoring (a large government agency that controls citizens' financial transfers, among other things).
But banks also need customers, so they usually say what requirements they have for transfers between individuals and which accounts will be blocked. This is an excess of monthly limits, this is an excess of the number of payments.
Until there are laws that will regulate this activity, any p2p trading in cryptocurrencies will remain in the shadow zone.