Nothing can be done for you here.
You can contact the regulatory body that the broker is registered with.
Discussion regarding specific brokers is not allowed in the forum, so the broker cannot be named.
You could complain to the ombudsman of the security authority, say if your broker is registred at Cyprus you contact the CySEC ombudsman.
Then there is forex peace army to host a bunch of broker reviews and offer complaint handling. You'll have to search for links.