Someone introduced me to this

Someone introduced me to this trading platform before and I participated in activities to earn money. However, after completing the activities, they not only refused to let me withdraw, but also claimed that I couldn't withdraw because I took too long to complete the activities. They even required me to reach a certain rank to be able to withdraw. Furthermore, if I wanted to withdraw quickly, I had to pay 100,000 HKD to activate VIP status. Now, the customer service has repeatedly used system maintenance and upgrades as an excuse to not respond to my inquiries, making it impossible for me to withdraw.