Hi can anyone help me in the acknowledgement of mqtt message receive

Hi all,

i am using eclipse paho mqtt v3.0 . I am facing an issue where i stop receiving message from the server side but i didn't get any acknowledgement that this topic is stop receiving messages . There is any callback or alert that ping or trigger that this topic is stopped receiving messages from the server.

For testing purpose i am using test.mosquitto.org host and port 1883
topic - device/zdc1/dc4f2204b013/sensor

but this topic stop receiving messages because publish side there is no message published . So if there is any alert and any callback then it is useful.