Keep her on lead for a week, try again, first time off the lead and don't listen put back on lead. More mine are on the lead they seem to listen.
I made the mistake of grass/parks let them off stright away, do as they please.haha punished me with deaf ears for the next few months. Think most of it's age. If it was all easy wouldn't be any fun
Got one of his collars , it's ok. Wanted to order some more, asked some stright forward questions , got some smart arse replies. Will not be given this clown any of my money, have a read on his Facebook page. Guy just rude