you have apologised isnt much more you can do, neighbour probably now wants to forget about it, just try not to do it again, you seem like a nice person and it probably praying on your mind too much, it wasnt intentional.
My new neighbour opposite parked his car in the road parallel to our car parked on the pavement in a disabled marked bay i had to find out whose car it was and go and ask him to move, he apologised then did it again and apologised again the third time I thought he is taking the pee so I got my two shar pei dogs [aka chinese fighting dogs] and paid him a third visit , our colonial cousins arent keen on dogs and neither are my dogs keen on them and when I started shouting they went beserk,I politely said next time I would let them loose, he hasnt done it since and that was over a year ago.
I am 73 and it took some bravery on my part to do this I am not proud of threatening someone but you have to fight back, he saw me as an old lady who could do rugger all to stop him.