Already transfer 250 dollars

Already transfer 250 dollars. It was supposed to be $1,000. I said I have no money. They say they can use a computer. Pre-borrow with a credit card. The result is not passed. Have been in touch. I've been called to invest. But the computer has been gone. Invested a project with $250. is in English. I can not understand it too. At first I had to ask them for a refund. also signed. But still no refund. Just use 250 dollars. There is no contact until now.