How many times did you call? If one agent says no the first time, I typically just call again. But due to the pressure on all Customer Agent teams during Covid, this could be a real reason. But I’d keep trying regardless.
The next thing to focus on is getting Hazmat approval because it looks like your competitors have or they would also be flagged. What actions have you taken with Seller Central or via flat files to get the product classified and approved for Hazmat?