IEEPA Tariff Refunds from DHL as Importer of Record

DHL was the importer of record on a bunch of my shipments. They've processed exactly one IEEPA refund and I have no visibility into the rest.

They won't tell me which shipments they've actually filed claims on. Even my account rep can't give me a straight answer on what's been submitted. Meanwhile there are hard deadlines, so if they're sitting on entries they never filed, I lose those refunds without ever knowing.

Questions for anyone who's dealt with this:

Has anyone gotten all their IEEPA refunds back where a carrier was importer of record?

Did you get any confirmation of which entries they filed on?

What worked to push them or escalate past the account rep?