why won’t the RSPCA help?

My neighbours abuse their dogs,they make them fight, they lock them in either a small cage or an even smaller one when they separate them neither have shelter. they live in their back garden so i can see everything. i phoned the rspca on the owners two years ago for tying (the then a puppy) so tightly to a trampoline that it couldn’t sit down without strangling itself. I think the rspca warned them im not sure but they didn’t do it again. The other day the younger dog was locked in the smaller metal cage in the pouring rain with thunder and lightning while it was trembling and crying in it’s own feaces and soggy news paper.this isn’t surprising because they’re usually left in their own dirt which attracts rats and makes them very sick which the rats eat! It took the rspca 4 days to react and when they did the neighbour knocked on the door and said that my little plan with the rspca didn’t work and she’s keeping her dogs.I would be happy if she kept her dogs by treating them better but if not shouldn’t they go to a better family? why didn’t the rspca even go into the back garden to see the conditions they were in? even though on the phone they said what the owners were doing was wrong why didn’t they do anything?

PLEASE call the police since the rspca isn’t listening.