Before sending funds to trade on your centralized exchange, always check at immediate time If the exchange still allows NGN (#) P2P because the way naira is been scrapped off from the P2P feature is overwhelming.
Ignorant to do this verification before sending funds from your self-custodial wallets to the exchange wallets will always cost you excess expenses on transaction fees from an exchange to another before you could realize yourself and call it mistakes.
So long as you are a Nigerian wey dey updated with what is happening at the crypto space you should know which exchanges that's still allowing P2P naira trading. Person no fit just stay carry him asset send for exchange wey him never trade before. I don't think it's possible to do that, because we are always updated here. This one no dey like the minimum deposit something wey person fit confirm first before sending to exchanges. Even if that one happen by mistake according to what you are saying, you can convert your asset for the exchange into usdt and withdraw it under the TON network to another exchange that's doing P2P. Ton network don't take any charges for now when you are withdrawing usdt under Ton network.