I think this is the same number I keep getting on my office answering machine. It could well be Talk Talk, trying to persuade me to change to them. After Carphone Warehouse took over OneTel they moved me to Opal Telecom. That was a BIG disaster, multiple direct debits, Onetel still taking money, lower speed broadband for more money. It is such a shame that Carphone seem to turn an already mediocre service into one that is a disaster. So, if it is TalkTalk, avoid them !