According to Strongs Concordance, the word for angel is #4397 in the O.T.
Malak
to dispatch as a deputy
a messenger
spec of God
i.e. an Angel (also a prophet, priest, teacher)
And the word ANGEL first appears in Genesis 16:7
So, what is this about Children of God being angels?
First four references to angels is not Malak but
bene ha-elohim’
Do your research please.