Www.Bitnary.org is scammers please help me get my money back

These ppl are stop my withdrawal from my deposit I put in and gained a profit.. they offered me a bonus in one week from investing on there site when I told them I couldn’t afford the bonus in that I just want to decline the offer in just continue wit my investment they said I could still withdraw my initial deposit and profit when I tried I could not withdraw my funds when i reached out to customer service again about the issue they tell me my funds had matured in that I would need to pay