Normally, I'm fairly understanding about wrong numbers.
A little less so when I've had difficulty sleeping for a couple of days and I am woken up to a phone call that is a wrong number.
Even less so when the person phoning has listened to my voice mail message (which is in english), then left a long winded message (in punjabi).
Slightly less so when that person calls back again 20 minutes later.
More so when I answer the phone (in english) and the person speaks to me (in punjabi) and I tell the person "wrong number!" (in english).
I soften a bit when the voice on the other line turns to english and says, "Oh what I do? I so sorry!"
But then I start to really get pissed when the person calls back three consecutive times after that within five minutes...