Need 6000 CD RDS E.O.N Security Code?

[Karibai]

I have got the answer:
Code for that one is 6515.

The code is correct, but the problem still here..
Cos someone, who owned this car before, already entered wrong code 13 times
and now it writes LOCKED 13
What should I do next?
Maybe there is some MASTER RESET CODE or something?
Thanks

 

[Timboishere]

Nope too late. originally there was 10 tries and then an extra 3 with a secret extra code but now its all used up and you need a new unit