Hung up as soon as I answered

Answered today, took him a while to said something "oh hello,is this chu-a (l think thats what he said the name in an aussie accent)" politely. So i said no and he apologise then hangup. Could be legitimately called the wrong number? you'll be the judge.

want to know who called me as I don't know the number

They keep calling but because my phone is set to Silence Unknown Callers they will never get through. Idiots.

No one answers when I take the call.