I can't figure out whether I have been blocked on whatsapp or not?

I messaged this person today but it hasn't gone through. As in that there are no ticks by the messages.

I have read the whatsapp page about how to know if someone has blocked you however it's very unclear.

I should mention this person has an iPhone therefore they can switch off their "last seen" status so I can't figure it out through that:|
It's very unusual and hard to believe that he doesn't have internet connection

Any help would be much appreciated

Well if they haven't been on. You wouldn't know if they blocked you and their would be only one tick as they can't read it once they blocked, hence why you can't message either. If its been an hour, don't stress if most of the day I think they blocked you. **** them anyway.