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A complaint has gone into Tesco, as it has turned out, we did get a policy sorted out although it took a very long time to get it in place, and still I don't know whether they have taken the false claim from off my old policy. I have asked them by e-mail, and in person to contact me when it had been removed, but have heard nothing.
My complaint is really about their appalling communication, and slowness in a) establishing that this was a false claim, and b) removing this claim in a timely fashion. We'll see what they have to say.