Firstly I am no legal expert by a long way but I am going through this at present with another broker, it all depends on how much they owe you and how far you are prepared to go to time wise and financially to get it back, however given it is owned by a UK registered company which is owned by UK nationals (I assume) this is what I would do (However seek legal advise first) but like trading there are risks;
1) Invite them to FPA as thread 3 then if they are shown as a scam other traders can be warned and they know you are not just a disgruntled trader.
2) Reach out on Forums to see if anyone else is in the same position with them and try to get a group together, it would be good in cases like this if FPA had stats on which brokers members use then anyone using the same one can be informed, I would be happy to share this information to the FPA. You could seek legal advise as a group so the costs could be shared.
2) Send an email and registered letter to Epic Ventures Ltd at their registered address informing them that if they do not return your funds that you will issue a Stat Demand (assuming you are owed £750.00 or more) giving them say 14 days to reply.
3) Assuming they don't reply have a Stat Demand served on them, which gives them 21 days to reply, if they do not reply then you can issue a Winding Up Petition against them, going to cost you £1,630 I think to do this and this is all based upon it not being defended otherwise it will be a lot higher.
My logic here is that unless they owe you a substantial amount they will not want to risk having a Stat Demand served on them, the mere threat of one is usually enough to action something BUT you need to be prepared though that if they do not respond to go through with it. If the company is wound up and the Directors are found to be negligence you could sue personally so if the amount is indisputable this is a very effective way and getting them to pay up. PLEASE PLEASE THOUGH SEEK SOME LEGAL ADVISE FIRST, THIS IS JUST MY VIEW GIVEN THEY ARE UK BASED AND THE INFORMATION IS JUST WHAT I HAVE COME ACROSS OR AM GOING THROUGH MYSELF.
What these company's rely on is given most are small deposits they know no one will take action against them as it would cost you more then what they have taken from you, but if no one does anything these people will continue to steal from traders, someone somewhere has got to make a stand.