You have no standing in this, so the answer to your question is no, you do not have a case to challenge the PCN. You are a legal stranger in the enforcement proceedings.
Before you go further, can we establish some facts pl.
The lease company paid the PCN and will deduct this from my salary.
Clearly the lease company cannot deduct anything from your salary because they are as much a stranger to your salary arrangements as you are to current proceedings.
So, what's the linking factor?
My guess is your employer. So pl let us know the chain of authority and accountability here.