At least you got your initial deposit back. That's better than some people do with some of these companies.
Good job on all the research.
Contact the UK FCA and FOS. Ask if this company with a UK address is authorized and ask them to please post a warning if it isn't.
Contact the BVI regulators. They don't usually take aggressive actions, but if no one files a report, they won't take any action.
Give SGT Markets all the info on the credit card charge. They really may not have heard of opteck, but did process the money through to some person or company.