Withdrawal trouble

I applied for withdrawal of 10,500 US dollars on July 2nd. Up to now, I have only received 31,000 yuan. The remaining has been held. I keep contacting the customer service. Since that I can’t find the broker’s customer support information, what I can only do is to contact the domestic agent - that is the Weizhi Group, currently called Meisheng Weizhi). However, its customer service staff responded with various excuses. The first excuse is that my amount of withdrawal is too large, so it have to be received in batches, but only after three withdrawals, the remaining money couldn’t be further withdrawn. The second excuse is that the current withdrawal has been frozen by the domestic police and needs to be waited. The third one is that the company can pay the amount of withdrawal in advance, which will not cause me any loss. They just kept me waiting patiently! Now I have been waiting for three months, and there is still no progress at all. How long will this last?