Can I just ask a few questions as I know this broker, have used them in the past and IMHO they're ok, I had no issues, other than I could better quotes elsewhere, so I moved. I have to say I'm a bit confused by your complaint..
Your appalling lack of money management caused you to lose circa 75% of your account, you were down to 3,500 but with two open positions - one down 2,200 and the other down 210. So you were close to wipe out, margin calls had occurred, overall this suggests (to an impartial observer) that you're completely clueless regarding how to trade and moreover margin requirements etc. You don't mention if your two open positions had stops.
So in order to keep these underwater positions open you needed to deposit more funds to your losing positions, bizarrely you were actually adding to losers. After losing 75% of your account and being very close to a full wipe out, you were now technically 92% down on your original 14,000.
Your credit card was refused by the broker, presumably the rest of your personal money management is as poor as your trading management. You then tried the likes of skrill to get money into the account to desperately protect your losing positions. Then, to cap it all, you're holding these negative positions as the FOMC taper announcement is made on December 18th when they surprise analysts and the market by beginning to taper which caused spikes across many securities - indices and FX. You get caught up in that maelstrom.
Your response to your appalling trading, honestly as bad as I've ever read anywhere, is to blame the broker. Let me make a suggestion, stop trading until you have devised a full trading plan and know what you're doing.