I've had about 10 of these today from a couple numbers very similar, never rings for more than a second at most, I just keep seeing these missed calls from this and similar number, all who have complaints here as being iselect.
I've not called them back and don't plan to.

unknown caller, suspect iselect as mobile numbers started calling after looked at their website, however asked for specific day and time, they ignored this and started calling straight away.

Caller: iSelect

Rang for a second then hung up.

Someone laughing on the line. Did not respond to me saying hello then hung up. Called me 2 times in the day. Scammer

received a call from this number 0435 051 816 it was iSelect Australia