For starters, no “period of parking”, see
An Act to provide for the destruction, retention, use and other regulation of certain evidential material; to impose consent and other requirements in relation to certain processing of biometric in...
8(1)A notice which is to be relied on as a notice to keeper for the purposes of paragraph 6(1)(a) is given in accordance with this paragraph if the following requirements are met.
(2)The notice must—
(a)specify the vehicle, the relevant land on which it was parked and the period of parking to which the notice relates;
Do not identify the driver.
Without complying with PoFA 2012, liability can not be transferred from the driver - who entered into a contract by parking - to the registered keeper.
They will reject your appeal because they always do.
Search the forum for similar cases to see what happens.