Do not call 1-844-994-1999 because the telephone number is a fake Microsoft Technical Support number created by cybercriminals to trick their potential victims into calling it. I got a warning message on my computer where an agent claimed they do genuine Microsoft support, but I knew it was a scam because Microsoft Technical Support doesn't call their customers, the customers call them.
Recipients of the fake messages who have called 1-844-994-1999 and given out their banking information are asked to contact their banks for help, change the password of their online accounts, and contact their local authority if they gave out other sensitive information.