I'd ask the same question on here before calling the ATF directly too.
I deal with the IRS and state tax agencies on a daily basis. I regularly get bad information and make it a point to record the date, time, agents name and ID number at the beginning of the call for this reason. Sometimes I call them out on the bad info and try t correct them in the nicest way possible. That's usually followed by the call being dropped mysteriously. When it happens we put the phone on speaker so that the rest of the office can listen in and get a laugh out of the situation. Sometimes we'll even let it drag on, put the phone on mute and we'll take bets on whether or not the agent will hang up because they get jammed up. I've paid for and received many delicious meals playing this game.
This is the government we're talking about here. Odd's are you're talking to someone who couldn't give a damn about your situation, has no idea what's going on and is pissing their days away until they can collect retirement. There's virtually zero accountability on their end if they lead you astray.
For the love of God, if you ever have a serious issue make sure you get your response in writing. You'd be amazed at how much of a shit show government offices are.
If you must call, RECORD EVERYTHING. It likely won't make a difference, but at least it's something.
