I have received phone calls from this number twice a day for about a month or so. I tried to call the number but no one answers. How do I stop this? It's driving me mad!

i recently just received a call from (02) 8415 8572 and when i answered it. It hanged up on me.

yours Truly;
William McKenzie

Numerous calls since 7 Sep 12 with no one on end of call when picking up. Probably computer initiated. Caller ID shows this basic format 08842398XX. Once home phone rings 4 times it stops and it is immediately followed by my mobile ringing in the format 02841585XX also hanging up after 4 rings. These two numbers have to be linked.

Calls from this number but hangs up before you can answer