My phone listed this number as “suspected spam” so I let it ring off. If it’s legit they’ll leave a voicemail but they didn’t. Have had scam calls on my new landline purporting to be TalkTalk (via India) who wanted me to download an app onto my mobile phone to speed up my TalkTalk router - very strange . TalkTalk had been compromised a couple of times now but have not warned customers. Shameful.