Impersonating immigration authorities to deliver a 'final warning' is a classic red flag for scams, especially when the target is a confirmed citizen like you. These fraudsters prey on fear to extract personal info or payments—hang up immediately if it rings a bell. Block the number and report it to authorities; never engage or verify details over unsolicited calls. Enable caller ID apps for screening, and consider registering on do-not-call lists to cut down on nuisances. If doubts linger, contact official immigration channels directly via verified websites, not the caller's leads. Staying vigilant keeps these tricks at bay.
They claimed to be immigration officials after my final warning, even though I'm a citizen.