ignore it, block the number if you can..but they also voip system from call centers abroad all scams, they also change there number constantly..example other day phone rang computer voice says this is bt youe line is going to be disconnected or some other spiel...err im not with bt, or you will get the ones who know your last name..wantoing you to take a survey..ie fishing for info or to confirm info they think they have..again ignore block number.