Dealing with it in the long run means ditching our antequated analogue phone system, which was never designed to take calls routed from the internet, with a digital system that uses internet protocols & therefore can use modern security systems.
In short, there is nothing that can be done at the providers end until all the analogue exchanges are decomissioned in 2025.
PS. Don't bother blocking the numbers. They don't exist in the real world & scammers change them several times a day.
Virgin BB TV Landline. Freeview/Freesat HD, Virgin Mobile, Tesco Mobile. Cable customer since 1993
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