Few steps that you must follow to draw their attention to your issue,
Follow the suggested steps below:
If you deposited your money via credit card then contact the credit card customer care asap and ask them to file a chargeback.
Go to their website and invite them to here via Live Chat
Invite them to join this thread via email (Send an email to every possible address).
You will find their email and address here
http://forexoptimum.com/about/contacts
Also, Share your story as a review
https://www.forexpeacearmy.com/forex-reviews/11097/forexoptimum.com
You can also share your story on their social media pages mentioned below:
https://www.facebook.com/Forex-Optimum-Group-552654774786503/
https://twitter.com/ForexOptimum_
https://plus.google.com/u/1/+Forexoptimumbroker
https://www.youtube.com/channel/UCFZSQ_mYKZRs_I2nfitmHSw
https://www.pinterest.com/forexoptimum/
If above suggestions do not work well then I have two more options for you. Contact Rebecca here
WinChargeback, she will help you to get back your money ORcontact
WinThisCase.
Note: Don’t forget to update your review/s when you got solution of your problem, Best Of Luck