I haven't done so and I'm not even a USEF member, but my understanding based on discussions about it are that it takes a very long time to get a complaint through the channels if it's not "serious" or has major implications, unless the alignment of the moon and the planets is just right and corresponds with scheduled meetings.
Thus do we growl that our big toes have,
at this moment, been thrown up from below!
chapter 6 of the general rules (GR) talks about hearings
The time line is considerable to allow all parties to meet and since this is people from all over the country you have to allow time. you also have to allow reasonable time for evidence , the accused right to gather evidence and talk to attorney ( if need be)
they do have timelines defined for many action points but I do not easily find one about when monies will be repaid.
When published in the magazine the timelines seem to be around a year