I use the QIVIUT platform in MT4, the website is https://cn.qclindex.com/, the deposit is 49,000 US dollars, there is 54646 US dollars in my account, and then I asked for a withdrawal, they use various reasons to prevent me from withdrawing funds, QIVUIT refers to it as a system update, but it has been more than 3 days and it was completed today. Now the customer service tells me that I need to deposit up to 66,000 US dollars to withdraw funds. What should I do now?