No, it hasn’t fixed anything. If anything now it has made it worse. Before it was only mobile and now with Landline too! I am also getting this issue with non contacts... and that’s what I am struggling with. So it’s pointless changing my contacts to whatever’s. Random people will call me, even from landline and it’s either listed as Russia (mobile) or United States (landline). This is so annoying and getting frustrated.
Further to hat Enlii suggested - can you please try Russia first of all (under SIM applications as part of the first step) and make sure that's selected/saved, then go back in and select UK & save - and let us know if that helps at all?