call·back 
/ˈkɑ:lˌbæk/ noun
plural call·backs /ˈkɑ:lˌbæk/ noun [count] 1 : a return telephone call
▪ She got constant callbacks from the salesman even after she asked him to stop calling. 2 : an official request or order for someone or something to return: such as a : a call for employees to come back to work
▪ With the latest callback, the factory will employ 30,000 workers.
b : a request to a worker to come back and fix problems
▪ If he used better materials, he wouldn't have so many callbacks.
▪ She got constant callbacks from the salesman even after she asked him to stop calling.
▪ With the latest callback, the factory will employ 30,000 workers.
b : a request to a worker to come back and fix problems
▪ If he used better materials, he wouldn't have so many callbacks.
