help me get my money back

i invested money with frontier asset management and investment , everything was going well until my financial adviser passed away some years ago, before that they used to pay me monthly interest , and now they have stopped paying, when i ask the reason for stopping the payment they say they are not making any profit at the moment, i want to cancel the investment and get my money back but they say they can only refund me by the year 2021. their contact no ***