get onto
idiomDefinition of get onto
1
: to start to do or deal with (something)
"We need someone to send out the invitations." "I'll get onto it right away."
2
: to start to talk about something
How did we get onto this topic?
3
British
: to speak to or write to (someone) about a particular problem, job, etc.
I'll get onto the doctor/plumber straightaway and see if he'll come round.