EEA (PR) Application Student and worker

[indeha]

Hi i need some advise

I am applying for permanent residence i have austrian passport and have been in the UK since 2005.
I moved to the UK with my dad and sisters in 2005
In 2006 my dad applied for residence permit for all of us, which was for 5 years period (i was 14 then)
whilst at uni, i started working part time(was doing 18-20 hours per week) from 2011 till now.

Now my question is when applying for the permanent residence, can i apply just as worker ( this is because i do not have CSI to show). Plus i cannot locate my RC due to moving to different addresses.
I can show 5 years P60s from 2011 to 2017,

Please i need some advise about how to go about this.