Unable to withdraw

I can withdraw small account at the beginning. It is hard to do so after making profit and increase the withdrawal amount. There are many excuses from June 2 till now. It has been 21 days, but I do not get a penny. This time, I just want to withdraw 8827 dollars. My total is 143082 dollars. I would like to change to another brokers if I do not withdraw sucessfully this time.