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.