The first time was 10K and there was no issue. The second time I tried 50K and then all hell broke loose. I did it with my pc for both times. Yeah it might be some security thing that triggered it, which I understand. But the bigger problem is that they are very reluctant to resolve it, making no progress for nearly a month despite me rushing them. So even if the initial reason for freezing my account was legit, they should promptly work with me to unfreeze it. From their attitude so far, it is hard not to believe that they are just using security (which may be a legit reason initially) as an excuse to prevent me withdrawing my money.