Not able to withdrawal fund from Fx opulence

I am using Fx opulence from last 6 month and I trade in synthetic indices. this is only broker who provide synthetic indices for trade.
I previously deposited my money and also withdrawal but.
my last request is pending from 8 days and also previously I raised a request for withdrawal and then dilted.
they are not processeding withdrawals and thair support is saying we are facing some technical issues so that's why we are upgrading our systems. so please do something my account is 18000 $ and all is client money.
so please provide some solutions what to do know and thair support system is also not responding now