call again
Come back again. Although it uses the word "call," the phrase refers to returning to a place, such as a store. I'm sorry we don't have that item in stock right now—please call again.
Call again.
Please visit this shop again sometime. (Said by shopkeepers and store clerks.) "Thank you," said the clerk, smiling, "Call again." Clerk: Is that everything? John: Yes. Clerk: That's ten dollars even. John: Here you are. Clerk: Thanks. Call again.