Thanks.
Pl post this letter.
If it passes scrutiny, then all you'd be doing is making reps on behalf of VWFS.
But you cannot sensibly do this because you know NOTHING about the matter.
Based on your account, I would write back to VWFS promptly and tell them:
They have sent the Third Party Authorisation letter to you in error because you did not take possession of and become liable to VWFS under your lease until ** on ***, whereas the alleged contravention occurred at ** on ***.
Unless VWFS make reps themselves or a competent Third Party on their behalf no later than 8 July then the authority may disregard any submission and increase the penalty by 50% to £**.