Returned call got message saying I had got a call for fund raising purposes. How do I block them? I am on the do-not-call register!

I am getting the same but don't answer it

Received a call from this number today @ 5.28 pm - the traditional time for scam merchants. Luckily it went unanswered.

I keep getting calls from this number up to 3 times a day. I don't know the number so I don't answer it but they never leave a message.

They've called me too but I'm not home and they never want to leave a message, all mum understood from them is that there from a finance company, must be a advertising place of some sort.

had few calls from number starts with 02852459 34 or 38 or 40 last couple of days, when we answer, there's just silent at the other end