Being a former IRS agent and frequently represent clients before the IRS, I have to say that these practices ARE scams. The IRS never does things like what you described. They are not normal IRS procedures.
Can you report to the police department NOW, or walk into to a nearby IRS customer service center to verify? The Police Department is open right now. The IRS customer service centers open at like 8 am tomorrow morning.
DO NOT GIVE THEM THE MONEY. CALL YOUR LOCAL POLICE DEPARTMENT. THIS IS SCAM. DON'T FOLLOW UP WITH THEM.
Fiona Chen, MPA, Ph.D., CPA, ABV, CFF, CITP
Our site put your question at the category not only into Tax and also in Fraud Examiner so that you may be helped by more viewpoints of different experts.
Please feel free to follow up on what progress was made today after the noon hours.
If you had money take out of your account and you need to reverse the process, the first step is going to the financial institution, then, later on, reporting to the FBI. They may have power and way to reverse or trace down the transactions. Sometimes, if they can find the crime group, they may be able to joint law enforcement internationally. If there is any recovery, you may get some money back, too. Don't give up. Follow up.