multiple calls no message

(02) 9199 9312 - I called back and got IVR of Wey Firm. It said they are calling on behalf of one of Australia's Charity. There was no one i can speak to. It was just the IVR.

This number has been calling me twice a day for the past 3 weeks when I answer it disconnects and when I called back it's a voicemail saying its a charity organisation so bloody annoying I tried to block the number but somehow I still get the call :-( :-(

I have figured out after finally, finally speaking to someone when I answered (instead of it being disconnected every time I tried to answer) that this number belongs to World Animal Protection, a non-profit that works to protect animals worldwide.

I keep getting called by this number, usually a couple of times a week... they never leave a voicemail and when I do pick it up, it disconnects straight away.

I would like to know how to block this number so I don't have any more calls

This number has called me everyday for the past 2 weeks and when I answer or call, it is just a dial tone then answering machine that says "The person at extension 800035 is not available. Please record a message...". And before that, it was a similar number, calling every day for almost 4 weeks. Annoying!