You can withdraw your Sentz balance into ByBit and then sell USDT/USDC for Naira.
Choose the "Withdraw" option on the home screen
Choose "As other Stablecoins" on the listed withdrawal options
Enter the amount you would like to withdraw
Save your USDC or USDT deposit address. You can find this in ByBit by doing the following:
Open the ByBit app and choose "Assets" on the Home Screen
Select "Deposit"
Select "Deposit Crypto"
Choose USDT or USDC
Polygon Network is recommended
Copy the deposit address
In Sentz, paste the deposit address so you can save ByBit as a withdrawal method
Choose "Select New Wallet"
Choose the currency (USDC or USDT) and the network that is shared by both platforms (Polygon, Tron)
Hit continue
Once you confirm, the funds will be sent to your ByBit wallet.
In ByBit, choose "More" on the Home Screen
Choose "P2P Trading". Go to "Sell" and choose your preferred merchant.
Confirm your order and you will receive Naira in your bank account through the ByBit merchant.