I once rang the RSPCA about a boxer dog living across from us that was left on its own for a couple of weeks whilst the owners were on holiday. Some chap came ONCE a day to feed it and let it out. The poor thing spent all day looking out of the window in hope! Rang the RSPCA, told no problem with us it's being fed and taken out!
More recently (and in a different house) a grotty, ginger, stray cat that we took in and looked after and fed him up (he took up residence in the greenhouse) disappeared for a few days and came back with a long, bloody, gaping wound round his neck, obviously he'd been caught in a snare. Rang the RSPCA who could only offer me loan of a trap to catch him and take him to our vet! This I HAD to do to help the poor thing and when I got him to the vet for treatment the vet rang the RSPCA who refused to pay for the op. to stitch his neck up but after some negotiation did offer to pay to have him neutered while he was under anaesthetic. He recovered very well, fortunately, I paid for the rest of his treatment.
I had a very good idea who was setting these snares locally and informed the RSPCA but nobody bothered to come and have a look round despite several phone calls.
They get no donations from me now.