If you 'have something done', you get somebody else to do something for you.
•I'm going to have my hair cut.
•She's having her house redecorated.
•I'm having a copy of the report sent to you
In informal English, we can replace 'have' by 'get'.
•We're getting a new telephone system installed.
•They will be getting the system repaired as quickly as they can.
•I got the bill sent direct to the company.
We can also use 'have/got something done' in situations where something bad has happened to people or their possessions. This is not something they wanted to happen.
•John had all his money stolen from his hotel bedroom.
•We had our car damaged by a falling tree.
•I got my nose broken playing rugby.
Exercises here