You don't have to create a new account since you have an account before. All that you have to do is to call upwork help center to help you out. And they will reactivate back your closed account.
But now you will have to choose one account, you can't have 2 accounts.
Hello Dear !
I am Mohammad Mizanur Rahman. My elder brother's name is MD Maniruzzaman. Unfortunately, his account is closed by mistake. His email is : email@example.com.
It is to be mentioned that, He can not access to upwork, so he requested to me to send you a message to reactive his account. Please reinstate his account to continue in world wide upwork.
Thanks a lots
For My elder brother