Refusal to allow withdrawal on funds

For the past 4 months, I have been struggling to put in withdrawals on my account to gather some funds. I keep on getting an error message that I need to call customer service to help me which I do but still to no solution. They keep on saying IT needs to look at my account and figure out what the block is... It has been 4 months and I still cannot put in a partial withdrawal as well as NO ONE is getting back to me... Is this a ploy of them to keep your investments without you being able to access the funds... I am highly concerned about their business ethic and would like to warn everyone out there.