You have to know someone who works as a permanent employee so that he or can talk for you with employer's..
You apply for a job if you lucky they call you for an interview
You firstly hand deliver ur cv and if successful you will be called in for interview, writting and they also wanna assess you by them self to see if you really gonna be able to deal wit customers.
When there's job ads
Submit a CV at the store when you external or send it to HR, internal, you apply with internal form and send it to your line manager, then they send it through to HR