Lol. 3 customer services...it has to be a wind up surely? Rung to ask, like I have with talktalk,if I can block withheld numbers.
I repeated the question four times. He then went away, came back and clarified what I wanted, went away, came back and said do you really want to block everyone from calling? I again explained. Oh, well, if you want to block people calling, you should turn off your phone.
Is there anything else I can help you with today Mr Jonathan's?
Nope!