You can get your puppy to come to you when called by having a dog treat in your hand and tell the dog to come to you while you hold the treat out in front of them at a distance.
Wave the dog treat in front of them and tell them to come on and they'll get the treat if they do come.
For example if you want the dog to go for a walk tell the dog that it can have that treat if it comes to you.
Then give the dog the treat. Eventually your dog will or should start coming to you when called with or without a treat.
It can just take some time for the puppy to learn.