Parking on Compton Street, BN21

The parking space offered via JustPark seems to be a scam. The owner of the parking space left a note on the windscreen and verbally complaint to us when we were picking up the car at the end of the day, that we had parked in his private space and he was forced to park his car on the road. He also said that it had happened to him before. We explained to him that we were unaware and that the only instructions we were given via JustPark was, not to park in space 1 or 10, as these were private spaces, so we didn't park in space 1 or 10, but in space 7. On JustPark it was also mentioned, the space would fit a large car, but that was also not true. Our car, a Ford Galaxy, barely fitted.