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I have had a call from BT(?)on my landline stating my ip address had been compromised and they were going to shutdown my access in the next 24hours while they changed my ip address. I was then instructed to press 1 on my phone to contact their technician.
Obviously a scam but why can't BT check the origins of these calls to prevent them?
there are numerous posts like yours and your question has already been answered - try using search facility
To save repeating things yet again, do a search of the forum about scam calls and you will be able to find the answer to your question your self.