To get your dog to come to you when called get your dog a tug toy and some treats that the dog likes.
When you call the dog to you, show them the treat and the tug toy and when the dog does come to you always give them the treat and don't tease them with it otherwise they'll learn that the treat don't mean anything.
Eventually if you start giving them a treat then the dog will eventually learn to come when called with or without a treat.
It can take time to train your dog to come to you so do be patient but eventually it should work.