LAVAPRIME is unable to withdraw

I was transferred to the LAVAPRIME platform by the TCC platform on January 18, 2020. The account number remains unchanged, and the funds are moved together. Now I want to withdraw some funds. What does the platform say? Your account is a demo account so it is uanble to withdraw. There are seven hundred and seventy thousand RMB in it, and now the account balance is 310,478.67 US dollars, and now I cannot withdraw a penny, do you have a conscience!