Need help for the BMW Z4

I hav been get it shine vinyl before,
but now can i claim BMW Z4 Limited again?
I heard my frien talk they say cant...and somone say can

Heeelp! PLS

I got same problem here..
now i have 6 refer friend in my list and did not get my Z4..
help me plss

you can't get the BMW if you got shine vinyls before, you can only get the refferal gift once per account