I have a marlin model 60 with less than 300 rounds through it. I shot a hundred rounds and took it apart and cleaned it no problem. Shot one hundred more rounds through it took it apart and cleaned it. Had some trouble getting it back together and might have pushed to hard and the hammer spring came off and jammed. Took it to a gunsmith he fixed it and cost me 25$. Took it to the range the next day shot about 55 rounds and the trigger locked up again. What should I do?