Claddagh playground crazy warning

At the the playground with the kids yesterday afternoon when an older woman shouted over, beckoning my. 7y/o to go and get her dog back for her. My son obviously didnt and came to me. I gave her a piece of my mind and she told me to.f off and take my r%t%rd with me. I was alone with 3 kids so just left quietly as shes clearly unhinged. Another parent i know, later told me shes asked other children too and has also shouted at them. The same dog (small, brown doodle maybe) has been running all over the pitches, car park and the main road for almost daily week or two now. She seems to stand in the car park and just let it loose. Its chasing after other dogs and she screams at anyone who suggests she put on a lead. Its possible shes living in the car park in one of the vans park there. Why haven't i reported it? Because the last time I rang about a different, more serious, incident, i waited for more than an hour an no one came. Pointless. So this is really just a heads up.