This is TMD told me below,  I cannot take risk, always something happening to my website. Then, they will blaming  me.  

"Currently, you do not have root access to the server.

In case you wish, we will gladly provide you with root access credentials.

Before that, we should inform you that none of our team would take any responsibilities if you execute any commands or perform any actions on your server which would cause any issues. In case that you agree with that, please update us with a confirmation, so we could update you with the desired password. "