Closed my acc without any reason

After sending documentation for approval they kept on rejecting it. Eventually they approved and I could finally start trading. I deposited money into my account and withdrew it same time. To see if they are legit or ****mers. Anyway didn't withdraw all they money left a balance in my acc. The next day they sent me a email saying we can longer do business with me and closed my acc down and demo acc without any reason. They even refunded my balance that was left in my acc. They are a bunch of ****mers.