ofc I wouldnt be happy but then I dont park where my car can be in a position to be towed away - you were parked on a dipped kerb and that is against by laws in some places. Whether or not the garage belongs to you, is irrelevant. You need to call your local council and fid out what they say about it.
Irrespective of this, you are going to 'do the same back' - like I said grow up, stop being churlish and dont park where you shouldn't, case solved
No misunderstanding of how childish you are being/going to be on my part at all, I can assure you