stolen money

got a call from someone named john parker. stated I was approved for a 1000 dollar loan. due my credit history I could get 1000wired to me via western union, but had to make the first months service repayment of 139.00 dollars before the remitted payment. I did so and was told that because on the reciept of my payment my middle initial was not listed I would have to pay another 139.00 which would besent back to me with 1000 dollar loan amount. I told them no I would not send it and to forget the loan, just send back my initial payment. Of course they would not do so. I advised that I wascontacting my attorney. After they called meso many times and I needed the money Iwent ahead and sent the payment After holding for 45minutes for the completion of the transaction, I was told to go to the western union counter abd wait on them to tell me the information to write on the form. I did so and just as he was about to give me the infrmation he stated that western union was adding an additional fee of 199 dollars in order to remitt payment. I advised again I would be contacting my attorney which did not seem to phase them. The following day they called again still trying to make me pay the fee. I feel crazy and scammed big time. what can be done to get my 300dollars back?