Unable to withdraw

I paid the membership fee of Wall Street online investment consulting company on August 3.
First withdrawal after payment on August 13.
The assistant teacher of Wall Street online investment consulting company dissolved the group on August 16.
Wall Street online investment consulting company started the promotion of capital guaranteed investment and financial management plan (I did not participate) on August 17.
Silvercrest's line customer service personnel did not reply on August 24.
There was still no response to the email sent to silvercrest on August 31.
The assistant teacher sent a resignation message, saying that someone would take over his line account and continue to provide services on September 28.
Unable to withdraw for 1.5 months. Customer service did not reply about the withdrawal.