Untrustable trading

I invested the money as they told me it will be double 2000 then cashback will be 3000 , so I did after doing so , they tell me to add more so I will receive 15000 , I've to repay 6500 when I took my last money I had on my savings just to make it grow , but instead they told me I will be fired because before completing the tasks when the guy for the first place he asked to see my bank balance n I showed him that I've nothing left but still he continued to do this to me. If I can only get my money I would be happy coz I'm left stranded , 😢