From what I’ve seen, the safest way is to only use trusted platforms like Binance or Kucoin, or reliable local apps. Another tip is to never release crypto until you confirm payment inside the platform.
Why mention two exchanges that does not have naira P2P. Do you not know they do not have P2P for naira after they removed it last two years or so.
Regardless of any platform that you are trading with P2P, just make sure you follow the rules. Do not release coin until you see the money sent to your bank account. Report anything like scam that you suspect.