1) are you sure that the IRS got your return?
2) what did the IRS refund trace indicate?
3) what does your return transcript show as to refund?
those steps may be unnecessary
AS I see it that leaves you only two options. one. write your congresspeople and include full details. No guarantee it will produce results. two. hire a tax pro that could file a power of attorney and get details of what has transpired. Based on that knowledge they MAY be able to do something to get you your refund. However, be wary if it's a small refund a pro will either not want to deal with it or charge a fee that is substantial in relation to what you were supposed to get back
