Extra-Long Time Withdrawal Process

I never had any problem with IC Market until recently. I recently gain some profit and I want to withdraw it. Normally this is a very simple process in IC market, and it doesn't need the extra headache. But, for some reason, my withdrawal request was denied. I thought it was because I withdraw more than I usually did, so IC Market suspected something weird is going on. So, I informed the customer service, and soon my withdrawal was processed. But, it took an extra-long time for them to do it, the money arrives in my account after a month. That is unacceptable.