IDIOMS

get onto

(transitive, informal) To introduce someone to something.

Example: Used other than as an idiom: see get,‎ onto.
To move onto an object, especially one on which it is possible to stand.
  The child will get onto the merry-go-round.
To contact a person or organisation about a particular matter.
  You should get onto the manufacturers and complain.
To connect, especially to the Internet or a network.
  With my new computer, I can get onto the Internet faster.
  My father got onto me for taking the car without asking.
  My mum got me onto this new diet and I've lost 5 kilos in the past two weeks.