We only support hedging, not netting. If you see netting on your MT5 account it’s probably due to incorrect login information. Kindly ensure you are using the correct account number and password when trying to log in.
Your account number is available in your dashboard below,
MT5 Dashboard: Deriv App | Deriv
When logging in, please use the trading password created when you signed up. If you are unable to remember the password, you may reset it in the same dashboard shown in the link above - the reset password section is on the bottom side of the dashboard.