SCAM!!asking more $ to proceed with the withdrawal

I never saw something like that. I have registered on this broker and uploaded all the documents such as ID and PoA. I deposit money via BTC and when I requested the withdrawal they sent and email confirming the withdrawal but they never sent the money to my BTC wallet. I have tried contacting the costumer support which is really bad, and they told me the withdrawal will only one proceed when I deposit more 873$. BIG LOL. SCAM BROKER!!!! and they are not regulated!!!