As the advert says, Breath in ... Breath out... the moments passed...let it go.
To be honest I thought I gave him plenty of room. Parked well left in the bay so bike can be seen and no bugger pulls in thinking its an empty bay.
In similar situation I found my bike smashed , parked in a designated bike parking space, the van is on camera and the police done nothing! If it was me in this situation I don't know how this will end up. Definitely not as you managed!