Returned Visa Application

Under the J1 visa,i have submitted in a visa application to extend my stay.The forms had been returned to me twice due to improper application in the form.Right now its impossible for me to re-submit the form because i have to leave the country.am i allowed to get a refund for that 300$ money order or should i keep these documentations for future reference?will i still have problems re-entering US in future under these circumstances?

It is my understanding that the fees are non-refundable.

As long as you correctly fill out the proper forms to obtain a new visa, you should not have trouble with re-entry. You may want to get help filling out your forms from an attorney who specializes in immigration.

Why do you think you would have a problem with reentry? Did you overstay during the time you were attempting to get the extension approved?