Print out a copy of what is on the district website, put together a folder of your son's scores and work, and try again at the school, then go to the district office. You will need to determine who to go to at the district level (special ed? GT?). Going to the school/district in person and sending letters may work better than phone calls.
Also, not sure if how GT is covered in Virginia, but in some states you would be able to request a placement team meeting. (Though, it would take some time before that occurred.)
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kcab