Brand Registry says I am not a US company (we are) denied 3 times.

Hello, we signed up for brand registry. We filled out all the paperwork and have the trademark already. They denied us three times for the same exact reason saying we are not a US company and that our legal representation on the trademark must be a US law firm.

We are a US corporation based in California and our attorney is based in North Carolina . I keep pointing this out, but they keep denying us. I’m starting to get really frustrated on this. And it’s always the same form letter. Any advice on this would be helpful.