get onto

verb (preposition)

1. Also: get on to board or cause or help to board (a bus, train, etc)
2. (intr) to make contact with; communicate with
3. (intr) to become aware of (something illicit or secret)the boss will get onto their pilfering unless they’re careful
4. (intr) to deliver a demand, request, or rebuke toI’ll get onto the manufacturers to replace these damaged goods