No securities company can do futures trading on behalf of customers, but it must open an account with a futures company. The procedure is similar to opening an account with stocks. After the deposit, it can be traded, or it can be traded in a futures company or online.
Upstairs is lying to you. If they really do over-the-counter transactions such as Hong Kong stock trading, it is illegal, that is, cheating. Maybe the funds will be swept away one day.