I have the same issue, but on my mobile. Same message every time "We've been trying to contact you regarding mis-sold PPI.." but different number. Originally i

I have the same issue, but on my mobile. Same message every time "We've been trying to contact you regarding mis-sold PPI.." but different number. Originally it was from a range of UK mobile numbers, but now it seems to all be foreign numbers so I guess the mobile operators picked up on it. Not really anyway to block it, but at least when it's an unknown foreign number I can be reasonably sure it's a scam and just reject the call.