got a letter through the post saying that i was being fined £150 for ALLEGEDLY parking in a restricted area when i pulled over to let someone out

so, where do i stand legaly as i was stopped but not parked, the picture even shows me with my brake lights and reversing lights on

and, this is what gets me, the address on the leter to send appeals to is differnt to the address i've been given over the phone AND i've only got 7 days in the letter but the phone call says i've got 10 days

or do i just say i never got the letter?