Legaltrade.co.uk Took money from my c card without permission other other

I was asked if i wanted to purchase insurance for the money i was trading with another company and they assured me that they were part of that company so i agreed to pay the $500.00 for the insurance with my credit card. They then stripped my credit card beyond its agreed limit and left me with the overcharged fine. After constant emails to try to recover my money nothing has worked the phone number is bogus and i personally am out of pocket to the tune of 1,900 gbp. Not happy.