Have a read of this thread for a near identical case of a MET parking PCN issued for an alleged contravention at a Krispy Kreme:
https://www.ftla.uk/private-parking-tickets/met-parking-fine-krispy-kreme-donuts-new-malden-parked-within-time-limit-but-theI can assure you that if you follow the advice in that thread, the outcome will be the same. That one has not yet concluded but will eventually be discontinued, just before they have to pay the £27 trial fee in a few months time. That one has been ongoing for over 10 months now and has another few months to run.
What I can assure you, with greater than 99.9% confidence, is that it will be discontinued.
Just follow the same advice as in that thread and you will, in around a year from now be very relived to find an N279 Notice of Discontinuance (NoD) in the post issued by DCB Legal.