The account was opened on May 29th with a deposit of $250, as requested by the account manager. As time went on, various products and information were provided, urging not to miss this opportunity and requesting continuous investment. The investor made three deposits totaling $15,250 until July 11th. Then, on July 15th, a withdrawal request of $1,000 was made. At that time, the account balance was $16,929, and after buying foreign exchange and stocks, the remaining available margin was $9,500. The account manager assured that there was no need to worry as the margin level was above 280%. However, on July 17th at 11:20 PM Korean time, the account manager suddenly called, saying that the margin level was significantly decreasing and urgently requested a deposit of $5,000 to prevent potential losses. When the investor explained that there was no money to deposit, the account manager expressed anger and abruptly ended the call. On July 18th at around 6 AM Korean time, upon checking, it was found that the remaining account balance (assets) of $16,929 had been depleted within a few hours. The account balance was -$1,805, indicating a ROI of -132% and a margin level of 23%. Regarding the $1,000 withdrawal request made on July 15th, there was a trading record stating "low margin level" and it was marked as "withdrawal request denied". The account manager, who had been calling every day, stopped contacting after the account balance became -$1,805 on July 18th. It is incomprehensible that the account balance, which was supposed to have remaining available margin of $9,500 even if the purchased foreign exchange and stocks incurred losses, had completely disappeared. Currently, the account balance is -$2,405, and the margin level is 114.25%. What should I do?